Reverse Dictionary: IN – INCN

INABILITY – nouns
– INHABILITY † inability, unfitness …1631 Sc.
– UNABILITY † inability …c1400
– UNABLENESS † the condition of being unable; inability, incapacity; disability …c1380
– UNABLETY † inability …c1380
– UNAPTITUDE † inability …1545
– UNCAPACITY † inability …1681
 
INACCESSIBLE – adjectives
– UNACCESSIBLE † inaccessible …1596
– UNCOMATIBLE unattainable; inaccessible …1694
– UNCOME-AT-ABLE unattainable; inaccessible …1694
– WAFF out-of-the-way, carelessly inaccessible …1874 Sc.
– WANDERING †* of places: out-of-the-way, inaccessible, remote …1600
inaccessible – nouns 
– DEATH O’ DAY anywhere considered by the speaker very far away or inaccessible …1900s Aust. sl.
 
INACCESSIBLY – adverbs
– TICK-A-LOCK inaccessibly …1998 Amer. dial.
 
INACCURACY – nouns
– UNACCURACY † inaccuracy …1702
– UNACCURATENESS † inaccuracy …1648
 
INACCURATE – adjectives
– FALSE AS A BULLETIN inaccurate, false …c1795 colloq.
– OFF BASE incorrect; inaccurate …1947 US sl.
– OFF ONE’S EGGS straying; hence, wide of the mark, incorrect, inaccurate, mistaken, in error …1792 Sc.
– UNACCURATE † inaccurate …1660
 
INACCURATELY – adverbs
– LARGELY † loosely, inaccurately …c1449
– UNACCURATELY † inaccurately …1674
 
INACTION – nouns
– PARALYSIS BY ANALYSIS inaction produced by over-thinking a situation …1971 US sl.
– UNACTION † inaction …1698
 
INACTIVE – adjectives
– ACTLESS * without action, inactive …1682
– BOWBERT † lazy, inactive …1513 Sc.
– DAMMISHED stunned, bewildered; inept, inert, inactive, stupefied …1721 Sc.
– DAULING dull, inactive …Bk1900 Eng. dial.
– DAUSEY, DAWSIE, DAWSY stupid, silly, bewildered; dull, inactive, doltish …1889 Sc. & Eng. dial.
– DAWSIE stupid, silly, bewildered; dull, inactive, doltish …1889 Sc. & Eng. dial.
– DAWSY stupid, silly, bewildered; dull, inactive, doltish …1889 Sc. & Eng. dial.
– DEAD-ALIVE dull, inactive, spiritless; stupid …1591 chiefly US
– DEAD-AND-ALIVE dull, inactive, spiritless, stupid …a1862 chiefly US
– DEDA simple, foolish, of inactive mind and body …B1900 Eng. dial.  
– DISABLEBODIED not able-bodied, not strong or active …Bk1900 Eng. dial.
– DO-NOTHING doing nothing; disinclined to work or exertion; idle, indolent, inactive, lazy …1832
– DUMPISH † dull, stupid, slow-witted; inactive, inert, spiritless; destitute of sensation; abstracted, insensible to outward things; dull, uninteresting …1545
– INERGETICAL †* without energy; sluggish, inactive …L17
– MARBEL feeble, inactive …Bk1905 Sc.
– MERVIL inactive of mind or body …Bk1905 Sc.
– MOTHBALL inactive, unused; stored away
– ONFRACK not active, not alert …Bk1905 Sc.
– ON THE SHELF inactive; useless …colloq.
– OONFERSELL inactive, inert, not lively, weakly …1871 Sc.
– OTIANT † inactive, indolent, doing nothing, at leisure, at ease …1845
– QUIESCENT motionless, inactive, at rest …1646
– SLACK-TWISTED of a loose, unsatisfactory character; lazy, inactive; lethargic, wanting in energy; mentally weak, shiftless …1802
– THEWLESS feeble, inactive …1895 Sc. & Eng. dial.
– THOWLESS wanting in energy, inactive, weak, spiritless, lazy; useless; insipid …1785 Sc. & N. Eng. dial.
– TOOM † idle, inactive, unoccupied …a1340
– UNACTIVE † inactive; indisposed or unable to act; hence, sluggish, slothful …1591
– UNACTIVE † remaining quiescent or idle …1599
– UNBAIN † slow, inactive …a1470
– UNBUSIED idle, inactive …1570
– UNFRACK not active, not alert …1825 Sc.
– UNGAIN clumsy, inactive, ungainly; inexperienced, unhandy, unskilful; loutish; disproportioned, ill-shaped …1790 Eng. dial.
– UNHINGE inactive, stiff-jointed …Bk1905 Eng. dial.
– VEGETIVE leading a merely physical existence; dull, passive, inactive …1882
inactive – person
– BATIE-BRIM a useless bungler; a slowcoach; an inactive, helpless fellow …Bk1891 sl.
– BATIE-BRIMMIL a useless bungler; a slowcoach; an inactive, helpless fellow …Bk1891 sl.
– BATIE-BUM † (derogatory) a lazy or inactive fellow; an idler; a simpleton, a fool; a useless bungler …1572 Sc.
– BATIE-BUMMIL † an inactive helpless fellow; a useless bungler; a simpleton; a fool…a1550 Sc. 
– CABBAGE (derogatory) a stupid, dull-witted, inactive person; a silly person; a dolt; a blockhead …1870 sl. 
– DRUMBELO a dull, heavy, inactive fellow …19C Eng. dial.
– DRUMBLE † a dull, inactive person; an inert or sluggish person; a worn-out person or horse …1575 obs. exc. Eng. dial.
– GLOIT † a blockhead; a lubberly inactive fellow, a lout …1788 Sc.
– GLUNDIE, GLUNDY † an inactive person; a fool; a stupid person …1825 Sc.
– GLUNNY † an inactive person; a fool; a stupid person …1825 Sc.
– HAMLEG a lazy or inactive person …1954 Amer. dial.
– IDOL † an inert, inactive person …1579
– LALL a lazy, inactive, useless person; a lounger; a dawdling child hanging about its mother …1825 Sc. & Eng. dial.
– MOPUS † a simpleton; a dull, inactive, stupid, or ineffectual person; a worthless person; a dreamer …a1635 obs. exc. Eng. dial.
– PAULIE, PAWLIE a slow, inactive person; a feeble, inanimate person …1825 Sc.  
– REST MAN † one who lives an inactive life …1542
– TARLOCH a silly, inactive girl; a coarse, ragged, sluttish woman …1825 Sc.
– VEGETABLE a dull, boring person who leads an inactive, undemanding, and monotonous life …Bk1988 sl.
– VEGETAL † one who vegetates, one who lives a dull, monotonous, inactive life …1626
– WALLIDRAGGLE a feeble, ill-grown person; a slovenly woman; an inactive person …Bk1825 Sc.
– WANDOCHT a weak, feeble, or puny person; a silly, inactive, worthless person …a1728 Sc.
– WANDOUGHT a weak, feeble, or puny person; a silly, inactive, worthless person …a1728 Sc.
inactive – verbs
– ACT LIKE THE DEAD LICE ARE DROPPING OFF ONE to be inactive, slow, or lethargic …c1960 Amer. dial.
– DAIBLE to go about in an inactive and feeble way; generally applied to children …1825 Sc.
– GET THE DUNT to rendered useless or inactive; esp. to be dismissed or rejected from a job or position …1929 Sc.
– HIRPLE to be dull and inactive from the effects of severe cold or illness …B1900 Eng. dial.
 
INACTIVELY – adverbs
– UNACTIVELY † inactively …1611
 
INACTIVITY – nouns
– FAINEANTISE ‘do-nothing-ness’ ; indisposition to do anything; indifference, inactivity …a1684
– IDLESHIP † inactivity, want of occupation, indolence …1357
– SLACK a spell of inactivity, idleness …M19 sl.
– UNACTIVENESS † inactivity …1647
– UNACTIVITY † inactivity …1654
 
INADEQUATE – adjectives
– C-3 third-rate, inadequate, inferior; highly unfit …1910s sl.
– CHICKEN-CRAP insufficient, inadequate, of poor quality …1940s sl., orig. US
– CHICKENSHIT insufficient, inadequate, of poor quality …1940s sl., orig. US
– DAY LATE AND A DIME SHORT, A inadequate; overdue and lacking; too little too late …1990s Amer. sl.
– DAY LATE AND A DOLLAR SHORT, A inadequate; overdue and lacking; too little too late …1990s Amer. sl.
– HALF-ARSE careless, inadequate, incompetent, second-rate …M19 sl.
– HALF-ARSED careless, inadequate, inferior, unsatisfactory, ineffectual, incompetent, second-rate …1865 US sl.
– HALF-ASS careless, ineffectual, inadequate, incompetent, second-rate; mediocre, insignificant, unsatisfactory …M19 sl.
– HALF-ASSED careless, inadequate, incompetent, second-rate, mediocre, insignificant …1865 US sl.
– HALF-BAKED incompetent, inadequate, below standard …E16
– MAIL-ORDER ridiculously inadequate or inferior …1923 Amer. sl.
– OF SORTS undistinguished, second-rate, barely adequate … …Bk1942 Amer. sl.
– ONE-EYED of a place or object: inferior, inadequate, unimportant, useless ….M19 sl., orig. US
– POKEY of an enclosed space: small and dark; inadequate …1849 UK sl.
– SKITTLING poor; inadequate …1959 Amer. dial.
– UNADEQUATE † inadequate …1644
inadequate – nouns
– BROKEN STICK somebody or something unreliable, undependable, or inadequate …1946 Amer. dial.
inadequate – person 
– BROKEN STICK somebody or something unreliable, undependable, or inadequate …1946 Amer. dial.
– GIMPY a person who is inadequate in some way …1968 US sl.
– GUY an incompetent person, one who is inadequate …1980s US campus sl.
– HACK an incompetent person; an inadequate …1958 sl.
– HALF-BAKE a fool, an inadequate person …1943 UK sl. 
– MESS-UP an inadequate or incompetent person; a person with problems …1944 sl. 
– NEWT a stupid, unsophisticated or socially inadequate person …1920s US college sl.
– SADDO a socially inadequate, unfashionable, or otherwise contemptible person …1992 sl.
– VARNISH a second-rate person, one who is inadequate …1902 UK society usage 
inadequate – verbs 
– CATCH AT A STRAW to resort in desperation to any utterly inadequate expedient, like a person drowning 
– CATCH AT STRAWS to resort in desperation to any utterly inadequate expedient, like a person drowning 
– CLUTCH AT STRAWS to resort in desperation to any utterly inadequate expedient, like a person drowning 
– FLUNK to do a skimpy, inadequate job …L19 sl., orig. US
 
INADEQUATELY – adverbs
– RAWLY inadequately …B1900 Eng. dial.
 
INADVERTENCE – nouns
– UNADVERTANCE  † inadvertence …1483
 
INADVERTENTLY – adverbs
– UNTHOUGHTED-LIKE thoughtlessly, inadvertently …1932 Amer. dial.
– UNTHOUGHTEDLY thoughtlessly, inadvertently …1835 Amer. dial.
 
IN AND OUT – adverbs
– NEEK-NACK rapidly moving in and out, backwards and forwards as in a game …Bk1905 Sc.
 
INANE – adjectives
– DOPEY stupid; inane …1895 Amer.
 
INANIMATE – adjectives
– DEADLY †* without life, inanimate …a1225
– SARNICK inanimate …Bk1904 Eng. dial.
– UNANIMATE † dull, inanimate, not enlivened …1614
inanimate – nouns 
– LAD any inanimate object …20C Irish sl.
 
INAPPLICABLE – adjectives
– UNAPPLIABLE † inapplicable …1588
 
INAPPREHENSIVE – adjectives
– HEAVY † slow of understanding, inapprehensive, dull, stupid …c1300
 
INAPPROPRIATE – adjectives
. – FUNNY unusual in a way which causes suspicion or unease; deceptive, dishonest, unethical; also, inappropriate, improper …1903 colloq.
– LIKE A LILY ON A DIRT TIN utterly inappropriate or unsuitable …1930s Aust. sl.
– LIKE A LILY ON A DUSTBIN utterly inappropriate or unsuitable …1930s Aust. sl.
– MALAPPROPRIATE inappropriate …Bk1910
– OFF BASE not appropriate; uncalled for …20C US sl.
– OUT OF THE WAY unsuitable, inappropriate, gauche …1976 Amer. dial.
– UNBESEEMING not befitting a person, etc.; unbecoming or inappropriate to …1583
– UNCOVENABLE † inappropriate, unsuitable, unfitting …c1374
– UNGANED inappropriate …Bk1905 Eng. dial.
– WELCOME AS FROST IN HARVEST, AS very inopportune, inconvenient, or inappropriate …1897 Sc.
inappropriate – nouns
– BREAK an error, blunder or mistake, often in a social situation; an inappropriate act or word, a faux pas …1884 Amer. dial.
– FAMOUS LAST WORDS something said that proves singularly wrong or inappropriate …1940s Amer. sl.
– FOOT-IN-MOUTH DISEASE the habit of making inappropriate, insensitive, or imprudent statements …Bk2006 US sl.
inappropriate – verbs 
– BACK THE WRONG HORSE to be wrong, to be mistaken; to make an inappropriate choice …Bk1942 Amer. sl. 
 
INAPPROPRIATELY – adverbs
– IMPERTINENTLY † inappropriately, incongruously, in a way contrary to reason, good sense, or propriety; improperly, unbecomingly …1640
 
INARTICULATE – adjectives
– LIKE A BUMP ON A LOG stupidly silent or inarticulate …M19 US sl.
– SHORT-TONGUED having a short tongue; hence, inarticulate, stammering, lisping, tongue-tied; also, taciturn, unready in speech …c1575  
– TIP-TONGUED inarticulate, indistinct in utterance, lisping …Bk1905 Eng. dial.
– TONGUE-TACKIT mumbling, indistinct in speech, inarticulate …1923 Sc.
inarticulate – nouns
– JABBER chatter; incoherent, inarticulate, or unintelligible speech …18C colloq.
inarticulate – person 
– FAFFLE a stammerer, one who is unable to articulate distinctly …c1900 Sc.
– JABBERER one who jabbers …c1675 colloq.
– MUSHMOUTH a person who speaks indistinctly or inarticulately …US sl.
inarticulate – verbs 
– BARBETTE †* to make inarticulate sounds; to mutter …c1480
– BLUTHER to make a noise in swallowing; to make an inarticulate sound …Bk1911 Sc.
– GABBLE to talk volubly, inarticulately, and incoherently; to chatter, to prattle; also, to read so fast as to be unintelligible …1577
 
INARTISTIC – adjectives
– UNARTIFICIAL † not displaying special or skill; unskilful, inartistic, clumsy …1591 now rare or obs.
 
INARTISTICALLY – adverbs
– UNARTIFICIALLY † inartistically, unskilfully …1591
 
INATTENTION – nouns
– SKYBUGGING scanning the sky aimlessly while riding a horse; also, not paying attention …1982 Amer. dial.
– UNATTENDANCE † inattention …c1449
– UNBISEINESS † inattention, carelessness …a1225
 
INATTENTIVE – adjectives
– ASLEEP AT THE BAG inattentive; absent-minded …Bk1942 Amer. sl.
– ASLEEP AT THE BASE inattentive; absent-minded …Bk1942 Amer. sl.
– ASLEEP AT THE SWITCH inattentive; not alert to a duty or opportunity; oblivious of responsibility …1908 Amer. sl.
– ASLEEP ON THE JOB inattentive; absent-minded …Bk1942 Amer. sl.
– BLAH inattentive; absent-minded …Bk1942 Amer. sl.
– BLANK inattentive; absent-minded …Bk1942 Amer. sl.
– DEAD ABOVE THE EARS inattentive; absent-minded …Bk1942 Amer. sl.
– DEAD BETWEEN THE EARS inattentive; absent-minded …Bk1942 Amer. sl.
– DEAD FROM THE HOOFS UP inattentive; absent-minded …Bk1942 Amer. sl.
– DEAD FROM THE NECK UP inattentive; absent-minded …Bk1942 Amer. sl.
– DEAD-HEADED inattentive; absent-minded …Bk1942 Amer. sl.
– DEAD TO THE WORLD unconscious of one’s surroundings, lost in a dream, day-dreaming; inattentive, absent-minded …20C sl., orig. US
– FLAKY inattentive, distracted, unreliable …1959 US sl.
– GONE TO SLEEP ON THE BAG inattentive; absent-minded …Bk1942 Amer. sl.
– GONE TO SLEEP ON THE BASE inattentive; absent-minded …Bk1942 Amer. sl.
– GONE TO SLEEP ON THE JOB inattentive; absent-minded …Bk1942 Amer. sl.
– HALF THERE inattentive; absent-minded …Bk1942 Amer. sl.
– NEGLECTIVE † neglectful, inattentive, careless …1611 rare or obs.
– NO ONE AT HOME inattentive; absent-minded …Bk1942 Amer. sl.
– NOT ALL THERE inattentive; absent-minded …1864 sl.
– NOT KEEPING ONE’S EYE ON THE BALL inattentive; absent-minded …Bk1942 Amer. sl.
– NOT ON THE JOB inattentive; absent-minded …Bk1942 Amer. sl.
– NOT THERE inattentive; absent-minded …Bk1942 Amer. sl.
– OSCITANT † gaping from drowsiness, yawning; hence, drowsy, dull, indolent, negligent, inattentive through drowsiness …1625 rare or obs.
– OUT OF TOWN inattentive; absent-minded …Bk1942 Amer. sl.
– UNATTENDING inattentive …1634
– UNATTENTIVE † inattentive …1591
– VARLESS inattentive, careless …1898 Sc.
– WITH A VACANT ATTIC inattentive; absent-minded …Bk1942 Amer. sl.
– WITH A VACANT HOUSE inattentive; absent-minded …Bk1942 Amer. sl.
inattentive – person
– CLOTH EARS an inattentive listener …1912 sl.
– DIRK a foolish, peculiar, or obnoxious person; an absent-minded or inattentive person; a jerk …1964 US sl.
– DIZ(Z) a silly or eccentric person; an absent-minded or inattentive person …1963 US sl.
– GOOF-OFF a person who is habitually inattentive to duty; a loafer, an idler, a blunderer …1945 US sl., orig. military
– HEAD-UP a stupid or inattentive person …Bk1975 Amer. sl.
– INADVERTIST †* one who habitually fails to take notice; an inadvertent or inattentive person …1679 
– MAGOO a useless or foolish person; an absent-minded or inattentive person …1932 Amer. sl.
– MENTAL MIDGET an absent-minded or inattentive person; a stupid person …1966 Amer. sl.
inattentive – verbs 
– HAVE ONE’S FINGER UP ONE’S ASS to stand about idly; to be inattentive or slow to act …1942 sl.
– HAVE ONE’S HEAD UP ONE’S ASS to be very stupid or inattentive …1924 Amer. sl.
– HAVE ONE’S THUMB UP ONE’S ASS to stand about idly; to be inattentive or slow to act …1958 sl.
– HAVE ONE’S THUMB UP ONE’S ASSHOLE to stand about idly; to be inattentive or slow to act …1974 sl.
inattentive – phrases
– NOBODY HOME an expression applied to any person thought to be stupid, feeble-minded,  inattentive, etc. …c1915 Amer. sl.
– NOBODY HOME UPSTAIRS said of someone considered to be stupid, feeble-minded, absent-minded, inattentive, etc. …1951 Amer. dial.
 
INATTENTIVELY – adverbs
– UNATTENTIVELY † inattentively …1611
 
INAUDIBLE – adjectives
– BASS † low in sound, barely audible, soft …c1450
– UNAUDIBLE † inaudible …1611
 
INAUSPICIOUS – adjectives
– LEFT-HANDED ill-omened, inauspicious, sinister …1609
– UNAUSPICIOUS † inauspicious …1601
– UNCANNIE of things: unlucky, inauspicious, tempting …1826 Sc.
– UNCANNY of things: unlucky, inauspicious, tempting …1826 Sc.
– UNCHANCY inauspicious, unlucky; ill-omened, ill-fated …1533 chiefly Sc.
 
INAUSPICIOUSLY – adverbs
– AWKLY † inauspiciously …1565
– SINISTROUSLY † inauspiciously, unfortunately …1607
 
INCALCULABLE – adjectives
– ONKENNABLE unknowable, incalculable …1818 Sc.
– UNACCOUNTABLE † incalculable; uncountable …1690
– UNDEEMINT † incalculable …Bk1905 Sc.
– UNDEEMIS extraordinary, incredible, fabulous, incalculable, immense; what cannot be reckoned …1871 Sc.
– UNDEEMOUS unexampled, unparalleled, extraordinary, remarkable, incredible, esp. of size or amount, inconceivably large, immense, incalculable …a1300 Sc. & N. Eng. dial.
– UNDOMIOUS extraordinary, incredible, fabulous, incalculable, immense; what cannot be reckoned …1871 Sc.
– UNDOOMIS extraordinary, incredible, fabulous, incalculable, immense; what cannot be reckoned …1871 Sc.
– UNDUMIOUS extraordinary, enormous, incredible, esp. of size or amount, inconceivably large, immense, incalculable …1747 Sc.
– UNDUMOUS extraordinary, incredible, fabulous, incalculable, immense; what cannot be reckoned …1871 Sc.
 
INCANTATION – nouns
– CANTATION * incantation, magical charm …1656 rare
– CANTION † an incantation, a charm …1656
– CARMINATION †* charming, incantation …1620
– FASCINATION † the casting of a spell; sorcery, enchantment, an instance of this, a spell, an incantation …1605
– GALDER † a charm, or incantation …c1000
– SIGALDER †* a charm or incantation …c1000
 
INCAPABILITY – nouns
– UNCAPABILITY † incapability …c1642
 
INCAPABLE – adjectives
– HAIVELESS shiftless, incapable, careless, extravagant, slovenly in habit, ill-mannered; unrefined …1866 Sc.
– HALF-COCKED not fully capable; not completely thought out; unfinished; incomplete …1833 US sl.
– HANDLESS † incapable or incompetent with the hands, or in action; awkward, clumsy …1413 obs. exc. Eng. dial.
– MATTERLESS incapable; incompetent; helpless; shiftless …1794 Eng. dial.
– OBADOUS † useless, incapable, weakly …a1838 Sc. 
– OBJADOUS † useless, incapable, weakly …a1838 Sc. 
– PARALYSED knocked out, incapable …L19 US sl.
– THRUMMY-THRUM useless, incapable …1870 Ireland
– UBADOUS † useless, incapable, weakly …a1838 Sc.
– UGGOVOUS † destitute, having nothing left; incapable, weakly, useless …a1838 Sc.
– UGIOVOUS † destitute, having nothing left; incapable, weakly, useless …a1838 Sc.
– UNCAPABLE † incapable …1587
– UNDEEDY helpless, incapable …BK1905 Eng. dial.
incapable – adverbs 
– UNABLY † in an unable or incapable manner …a1400-50 now rare or obs.
incapable – person
– ABLACH, ABLACK, ABLICH an insignificant, worthless person; an incapable person …1852 Sc.
– CABBAGE (offensive) a brain-damaged or mentally subnormal person; an inert, incapable person …1987 colloq.
– MAFFLE-HORN an incapable, blundering, inefficient person …Bk1905 Eng. dial.
– UNDOUGHT a weak, puny person; a silly, incapable, worthless person …1644 Sc.
– WALKING CORPSE a person hardly distinguishable from a corpse save by the power of movement; a feeble, useless, incapable fellow; a ‘moving piece of flesh’ …1693
– YOWMAN a stupid, incapable fellow …Bk1905 Eng. dial.
 
INCAPACITATE – verbs
– KEEL UP to incapacitate, esp. by illness or age; to kill, to deprive of life …1856 Amer. dial.
– UNABLE † to render unable; to incapacitate or render unfit …c1380
– UNCAPACITATE † to incapacitate …1668
 
INCAPACITATED – adjectives
– KEEL OUT incapacitated because of illness …1916 Amer. dial.
– SNAKE-BIT helplessly incapacitated; ineffective …1940s Amer. sl.
– SNAKE-BITTEN helplessly incapacitated; ineffective …1940s Amer. sl.
incapacitated – person 
– LAME DUCK a lame or incapacitated person, or one who is old, weak, or ineffective; an invalid; hence, someone or something of no use or value; an inefficient person …1814 sl.
incapacitated – verbs 
– GO SOUTH to lose, to be defeated or incapacitated; to be beaten …1903 Amer. dial.
 
INCAPACITY – nouns
– UNABLENESS † the condition of being unable; inability, incapacity; disability …c1380
 
INCARNATED – adjectives
– BODYFIED incarnated, embodied …1942 Amer. dial.
 
INCARNATION – nouns
– CARNATION † incarnation …c1410
 
INCAUTIOUS – adjectives
– HAGGLIN’ rash, incautious …1831 Sc.
– INCAUTELOUS † heedless, unwary, incautious …1610
– UNCANNY giddy, careless, incautious, imprudent …1638 orig. Sc. & N. Eng. dial.
– UNCAUTELOUS † incautious, unwary …1628
– UNCAUTIONED † incautious …1671
– UNCAUTIOUS † incautious …1644
– UNCHARY incautious …1601
– UNCIRCUMSPECT 1. of persons: not cautious, imprudent, unwary …1502
2. of actions, etc.: incautious …1563
– WARELESS † unwary, incautious, imprudent …1562
incautious – person
– IMPRUDENT † a rash, heedless, or incautious person; one who is indiscreet …1753 
incautious – verbs
– LEAD WITH ONE’S CHIN to act incautiously; to act without restraint …1940s sl. orig. boxing
 
INCAUTIOUSLY – adverbs
– UNCIRCUMSPECTLY incautiously …1535
 
INCAUTIOUSNESS – nouns
– UNCAUTELOUSNESS † incautiousness …a1656
– UNCAUTIOUSNESS † incautiousness …1680
– UNCIRCUMSPECTION incautiousness …1598
 
INCENSED – adjectives
– EDGED angry, incensed, mad as hell …1982 US sl.
 
INCENTIVE – nouns
– MAINSPRING the chief motive power; the main incentive …c1695
 
INCESSANT – adjectives
– UNCEASABLE † incessant …1604
– UNCESSANT † incessant …1548
 
INCESSANTLY – adverbs
– EARLY AND LATE at all hours, continuously, incessantly …c1330
– LIKE UGLY ON A BABOON tenaciously; incessantly, untiringly …1968 Amer. dial.
– LIKE UGLY ON AN APE tenaciously; incessantly, untiringly …1968 Amer. dial.
– LIKE UGLY ON A TOAD tenaciously; incessantly, untiringly …2005 Amer. dial.
– LIKE UGLY ON WARTHOG tenaciously; incessantly, untiringly …2006 Amer. dial.
– OUT OF THE FACE incessantly, straight through without stopping …Bk1900 Eng. dial.
– UNCESSANTLY † incessantly …c1460
 
INCESSANTNESS – nouns
– UNCESSANTNESS † incessantness …1627
 
INCESTUOUS – person
– FAMILY RAM an incestuous male; a man who sleeps with two or more female members of the same family …1990s W. Indies sl.
 
INCH – adjectives
– UNCIAL pert. to an inch or an ounce …1650
inch – nouns 
– SCOTCH ELL 37.0958 inches …1785 Sc.
– SCOTS ELL 37.0958 inches …Bk1904 Sc.
 
INCIDENT – nouns
– ACCIDENT † an occurrence, incident, event …c1374
– ADVENEMENT †* that which comes or happens; an event, incident …1490
– BEFALL † a case, circumstance, incident, accident …1491
– PASSAGES a short story; an incident …1899 Ireland
– TIDING † something that happens; an event, incident, occurrence …c1205 obs. or arch.
 
INCIDENTAL – nouns
– BY-THE-WAY an incidental remark …1896
– OBITER † something said, done, or occurring by the way; an incidental matter …1607
 
INCIDENTALLY – adverbs
– ACCIDENTARILY † by way of accident; casually, incidentally …1651
– ACCIDENTLY † non-essentially, incidentally, as a secondary effect …1506
– OBITANEOUSLY † by the way, in passing …a1834 nonce word
– OBITER by the way, in passing, incidentally …1573
– OBITERLY †* by the way, in passing, incidentally …1605
 
INCISION – nouns
– CARF † cutting, a cut, an incision; a wound …a1000 obs. exc. Eng. dial.
– GARSE † a cut, incision, gash …a1225
– KERF the result of cutting; the incision, notch, slit, etc., made by cutting, esp. by a saw …1523
– LANCE † a cut, incision, slit …1669
– LANCEMENT †* the act of lancing or cutting; an incision …1658
– SCRAZE a scratch, a graze; a slight incision …Bk1904 Eng. dial.
 
INCITE, INCITING  adjectives
– ADHORTATORY † persuading or urging to a course; inciting …1660
– INCITATORY †* tending to incite, stirring, stimulative …1610
incite, inciting – verbs 
– ADHORT † to urge, to exhort, to incite …1539
– AGGRAVOKE to provoke, to incite …1967 Amer. dial.
– ARR to egg on; to incite to quarrel …Bk1898 Eng. dial.
– ART to incite, to egg on …Bk1898 Eng. dial.
– EAGER ON to incite; to hark on …Bk1900 Eng. dial.
– EDGE † to urge on, to incite, to provoke, to encourage a person; also, to stimulate, to give activity to an industry, etc. …1575
– EGG † to incite, to encourage, to urge; to provoke, to tempt …c1200
– EGGLE to incite, to instigate, to egg on, to stir up, to quarrel …1880 Sc.
– EGG ON to incite, to encourage, to urge; to provoke, to tempt …1566
– EICKEL UP to stir up, to incite …1924 Sc.
– ERT to urge onward, to incite; to irritate …1789 Sc.
– GIVE AN EDGE TO † to stimulate, to incite …1602
– HAG † to incite, to urge; to try to persuade …1587 obs. exc. Eng. dial.
– HALLOO to urge on or incite with shouts …1568
– HALLOW to chase or pursue with shouts; to urge on or incite with shouts …c1340
– HEARKEN ON to encourage, to urge on, to incite …1851 Eng. dial.
– MAN ON to incite; to urge …1839 Eng. dial.
– NETTLE to incite, to rouse …a1592
– PICK AT THE TURKS to incite to anger; to nag at; to tease …1786 Amer. dial.
– PICK AT WEST POINT to incite to anger; to nag at; to tease …1884 Amer. dial.
– POKE to stir up; to incite, to goad, to irritate …c1400
– PRORITATE † to stir up, to provoke, to irritate, to incite …1620
– PROVOCATE †* to provoke, call forth, incite …1432-50
– SET AN EDGE UPON † to stimulate, to incite …1609
– TAKE UP † to urge on, to incite …1565
– TICE † to encourage, to incite, as a dog …Bk1905 Eng. dial.
– TICKLE † to stir up, to incite, to provoke; to prompt or impel to do something …1532
– TOLL † to attract, to entice, to allure, to decoy; to incite, to instigate …c1220
– TORCH UP to incite, to urge …Bk1913-17 Amer. dial.
– WHIP to urge, to incite, to rouse; to restore to energy or vitality; to revive …1573
 
INCITED – adjectives
– PROVOCATE †* provoked, stimulated, incited …1432-50
 
INCITEMENT – nouns
– ADHORTATION † encouragement, persuasion, incitement …1536
– EDGEMENT incitement, urging, persuasion …Bk1900 Eng. dial.
– EGGING an urging forward, incitement, instigation …c1200
– EGGMENT † incitement, instigation …c1340
– ONSETTING incitement, instigation …1619
– TOLLING † the act of enticing, allurement; incitement, instigation …a1225 obs. exc. Eng. dial.
 
INCITER – person
– BELLOWS-BLOWER an inciter of strife, etc. …1849
– EGGER † one who incites or urges on; an instigator …1598
– MOB-DRIVER † one who incites a mob …a1734
– MOTIVE † an inciter, an instigator, a promoter …1600
– MOVER a person who incites others to action; a promoter, an instigator, or originator; often used with a modifying word, as ‘first’, ‘chief’, etc. …c1425
– ONSETTER † one who sets on, or urges on; an inciter …1549
– PROVOCANT * one who provokes, incites, or stimulates a person, reaction, etc. …1894 rare
 
INCIVILITY – nouns
– INDISCRETION † incivility, impoliteness …1721 Sc.
– UNCOURTESY † discourtesy, incivility …c1380
 
INCLINATION – nouns
– DECLENSION the act of declining, or deviating from a vertical or horizontal position; slope, inclination; a declining or sinking into a lower position, as of the sun towards setting …1640-4
– EDGE † of persons: ardour, keenness in pursuit of an object; in weaker sense, inclination, liking …1581
– FANTASY † inclination, liking, desire …c1374
– HARLIN some degree of affection, an inclination towards …1805 Sc.
– HARLIN-FAVOUR some degree of affection, an inclination towards …1742 Sc.
– HEART † intent, will, purpose, inclination, desire …c825
– INKLING a desire, an inclination …1978 Amer. dial.
– SMACKERING * an inclination towards or hankering after or for a person or thing …L16
– STOMACH desire, appetite, or inclination
– TALENT † inclination, propension, or disposition for anything; wish, desire, appetite …a1300
– THEAT a liking or inclination for …1886 Sc.
inclination – verbs
– AFFECTATION † inclination towards, affection, liking, fondness of …1607
– BEND † turn of mind, inclination, bent …1591
– BENT † inclination, bowing, stooping, nodding …1584
– HANG A NOSE † to have an inclination or hankering …1655
– MENK to have an inclination or longing for anything …Bk1905 Eng. dial.
– VEIN † an inclination or desire, a tendency, towards something specified …1587
– VELLEITY a mere wish, desire, or inclination without accompanying action or effort …1624
 
INCLINE – nouns
– HEALD a slope, incline, declivity; a hill …Bk1902 Eng. dial.
incline – verbs
– ABOW † to bend, to incline, to bow, to stoop; fig. to do homage or reverence; to submit …c1000
– ACCLINE †* to incline, or slope towards …c1420
– AFAITE † to affect, to influence, to incline, to dispose, in any way …c1230
– AFFECT † to incline or like …1606
– CAST † to have an inclination; to incline, to slope, to slant …1599
– HEALD to bend downwards or to one side; to lean, to incline, to slope …1703 Sc. & Eng. dial.
– HEALD TO to incline to, to be favourable to …Bk1902 Eng. dial.
– HEEL to fall; to lean or incline …1836 Amer. dial.
– INCLINATE to incline to, to be disposed to …Bk1902 Eng. dial.
– OFFER † to incline, to tend in some direction; to have an inclination or disposition to …1639
– TILD to tilt or incline at one end …Bk1905 Eng. dial.
– TO-HIELD † to cause to incline, to lean, to bend, to fall over ; to push or pull down …c1205
 
INCLINED – adjectives
– AFFECT † disposed, inclined …c1400
– AFFECTIONATE † mentally disposed, inclined …1533
– AFFECTIONATED † 1. inclined or disposed …1578
† 2. unduly inclined or biased; swayed by affection; partial …1586
– AFFECTIONED disposed, inclined in any way …c1555 arch.
– AMINDED * disposed, inclined …L16
– BAIN † ready, willing, inclined …c1325 obs. exc. Eng. dial.
– BENT † determined, resolute, devoted, inclined …1548
– FAIN disposed, inclined or willing; eager …c1205 arch. or Eng. dial.
– INDICTED inclined, addicted …1896 Sc.
– RIFE quick; ready; inclined to …1853 Sc. & Eng. dial.
inclined – verbs 
– FEEL TO to want, to desire; to want to, to feel inclined to do something …1837 Amer. dial.
– MIND to wish, to have a mind to; to feel inclined or disposed to …1792 Sc. & Eng. dial.
 
INCLINING – adjectives
– ON THE LEAN inclining, sloping …1850
– PARTIAL inclining more to one side than another; crooked …L18 sl.
 
INCLUDE – verbs
– ADNUMBER † to count in, to include among …c1526
– BECLIP to include, to comprise, to comprehend, to contain …c1230 arch.
– DEAL SOMEONE IN to include in an undertaking, often a criminal one, to give someone a share …1940s sl., orig. US
– TAKE † to include, to comprise; to contain …c1200
 
INCLUSIVE – adjectives
– ALL-IN inclusive of all …1890