Reverse Dictionary: UNDERSTAND

ADJECTIVES
1200 — BRIGHT easy to perceive or understand; clear, evident
1320 — DARK hard to understand; obscure in meaning
1400 — MURK obscure, hard to understand → obs.
1400 — PERCEIVANT perceiving, observant, observing, understanding → obs.
1526 — INTERPRETATE interpreted, understood → obs.
1529 — FAMILIAR homely, plain; hence, easily understood → obs.
1598 — SMALL-KNOWING knowing or understanding little
1674 — CRAMP difficult to understand or decipher
1678 — PERILEPTIC characterized by comprehension or rational understanding → obs.
1745 — CRANK awkward or difficult to pronounce, understand, or execute → obs.
1775 — UNACUTE lacking understanding
1854 — SACKY → ZACKY imbecile, deficient in understanding → Eng. dial.
1875 — UNBESOTTED able to understand, wise
1925 — PERLUCID clear in expression; easy to understand
1950 — NOWHERE incapable of understanding → US sl.
2006 — CLEAR AS VODKA very understandable; often used sarcastically → US sl. (Bk.)

ADVERBS
1300 — SKILLWISELY reasonably; rationally; with understanding → obs.
1904 — RENABLE fluently, easily to be understood → Eng. dial. (Bk.)

INTERJECTIONS/PHRASES
1623 — BEYOND ONE’S DEPTH beyond the range of one’s competence or understanding
..L18 — DO YOU OLIVER? do you understand? → rhyming sl. (Oliver Cromwell on ‘tumble’ to understand)
..L18 — DO YOU SAVVY? do you understand
..L18 — SAVVY? do you understand
1882 — IT BEATS ME I don’t understand → sl.
1892 — OUT OF ONE’S DEPTH beyond the range of one’s competence or understanding
1905 — ILL TO FOLLOW difficult to understand → Sc. (Bk.)
1910 — JENNY SASS PASS I do not understand; (French ‘je ne sais pas’) → World War I Amer. sl.
1910 — JENNY’S PA I do not understand; (French ‘je ne sais pas’) → World War I Amer. sl.
1910 — WE HAD ONE BUT THE WHEEL CAME OFF used to indicate that the speaker has not understood the subject of a conversation
1930 — ARE YOUR BOOTS LACED? do you understand?
1930 — I HEAR YOU an emphatic way of saying I understand, ‘yes’ → sl.
1940 — DO YOU DIG ME? do you understand? → World War II Amer. sl.
1940 — MESSAGE RECEIVED I understand what you’re getting at; there’s no need to go on about it → colloq.
1940 — MESSAGE RECEIVED LOUD AND CLEAR I understand what you’re getting at, there’s no need to go on about it → colloq.
1947 — COMPY? do you understand? → US sl.
1962 — YOU LOST ME I don’t understand what you’ve said → sl.

NOUNS
..888 — I-WIT knowledge; understanding; wits, senses → obs.
1225 — KNOWLEDGING the condition or faculty of knowing; understanding, cognizance, notice → obs.
1300 — SAPIENCE wisdom, understanding
1387 — KNOWLEDGE the faculty of understanding or knowing; intelligence, intellect → obs.
1399 — PERCEIT perception, understanding, comprehension → obs.
1500 — PERCEIVERANCE perception; awareness; understanding; a perceiving with the mind → obs.
1500 — PERCEIVERATION perception; awareness; understanding; a perceiving with the mind → obs.
1534 — PERCEIVANCE mental or physical perception; discernment, wisdom, understanding; awareness, sense → obs. exc. Eng. dial.
1587 — SKILL knowledge or understanding of something → arch.
1588 — HEAD-PIECE the head, as seat of the intellect; brain, understanding, intellect
1624 — SUBINTELLECTION the act of supplying in thought
1662 — PERCIPIENCY perception; recognition, insight; a good understanding of things
1714 — INTELLECTUALS. intellect, understanding, mental capacity → Sc.
1768 — PERCIPIENCE perception; recognition; insight; good understanding of things
..L18 — SABBE → SABBY → SABE understanding, intelligence, awareness
..L18 — SAVEY → SAVVEY → SAVVY understanding, intelligence, awareness
..L18 — SAVV understanding, intelligence, awareness
..L18 — SCAVEY understanding, intelligence, awareness
1815 — GUMPTION common sense; good judgement; understanding, intellect → Amer. dial.
1825 — GRAMULTION common sense, understanding, gumption → Sc.
1874 — KENNING understanding, power of apprehension → Sc.
1891 — RECKONING comprehension, understanding, knowledge → Eng. dial.
1900 — GUMSH common sense, understanding → Eng. dial. (Bk.)
1901 — MONKEY’S FIST something difficult to understand, a puzzle → obs.
1904 — SCOLLE the skull, the head; the brain; understanding, ability → Sc.
1913 — CLOSED BOOK a thing of which one has no understanding
1928 — HAYSTACK AGREEMENT a secret understanding → Amer. dial.
1951 — FANG mental grasp, understanding; the ‘hang’ of a thing → Sc.

NOUNS, PERSON
1570 — A HARD NUT TO CRACK a person who is difficult to convince, understand, or know → Aust. sl.
1970 — SQUIRREL a person who is slow to understand (Bk.)

VERBS
..900 — I-WITE to understand, to know, to get to know, to learn → obs.
..933 — ACKNOW to come to know, to recognize; to understand → obs.
1000 — AYETE to understand, to comprehend; to recognize, to perceive → obs.
1000 — HARKEN → HEARKEN to listen to; to heed; to understand, to learn by hearing → now poetic
1200 — ONFANG to take with the mind; to conceive or understand in a particular way → obs.
1200 — UNDERFIND to perceive, to understand → obs. exc. Eng. dial.
1300 — KEN to know, to understand, to perceive a fact, etc.; to be aware of → now chiefly Sc.
1325 — BEKNOW to admit one’s knowledge of; to acknowledge, to confess; to know, to understand → obs. exc. Eng. dial.
1500 — SKILL to understand, to comprehend → obs. exc. Eng. dial.
1625 — FATHOM to get to the bottom of; to thoroughly understand
1660 — HAVE GUTS IN ONE’S BRAIN(S) to have a solid understanding; to be genuinely intelligent; to have sense → colloq.
1785 — SAVEE → SAVEY → SAVEZ → SAVVEY → SAVVY to understand or realize the meaning of something → sl.
1790 — DING IN TO SOMEONE to repeat till understood, to force into the understanding → Sc. & Eng. dial.
1792 — BE DOWN ON to be aware of, to understand → obs.
..L18 — SABE to understand, to be aware of
..L18 — SCAVEY to understand, to be aware of
..19C — CATCH THE WIND OF THE WORD to quickly understand the meaning of what is said, to catch on → Irish
..19C — DEAL THE BANK to settle a dispute; to come to an understanding → Sc. 
1804 — INSENSE to cause to understand; to explain, to inform; to enlighten → Sc. & Eng. dial.
1807 — KNOW (ALL) THE ANGLES to have a comprehensive knowledge of something; to understand the subtleties
1811 — SUBINTELLECT to supply in thought; to understand
1815 — TWIG to understand or realize the meaning of something → sl.
1819 — DROP TO IT to understand or realize the meaning of something → sl.
1821 — CATCH THE DRIFT to understand; to follow the direction of a discussion, argument, etc.
1838 — TAKE to understand → Sc. & N. Eng. dial.
1844 — READ LIKE A BOOK to understand one’s thoughts, motives, etc. → sl.
1846 — TUMBLE TO to grasp the meaning or hidden implications of an idea, circumstance, etc. → sl.
.M19 — UNDERSTUMBLE to understand → sl.
1853 — HAVE ONE’S NUMBER to understand a person’s real motives, character, etc. → sl.
1857 — GET THE LEES OF ANYTHING to get a right understanding of anything
1859 — NOUS to understand, to learn → sl.
1866 — UMBLE-CUM-STUMBLE to thoroughly understand, to detect, to suspect
1867 — READ to understand, to perceive, to comprehend fully; to estimate truly → Eng. dial.
1870 — RIDDLE to explain, to solve, to understand → Sc. & Eng. dial.
1875 — MAKE NEITHER END-LANG NOR SIDE OF to make nothing of, to not understand or comprehend → Eng. dial.
1883 — TUMBLE TO THE RACKET to understand; to perceive; to comprehend; to get accustomed to a thing → Eng. dial.
1884 — CATCH ON (TO) to understand or realize the meaning of something → sl., orig. US
1885 — HITCH ON to understand → US sl.
1886 — INTAKE to understand, to comprehend, to ‘take in’ → Eng. dial.
1887 — CARR to understand; to comprehend → Eng. dial.
1887 — CARRY Eng. dial. – to understand, to keep in mind, to remember → Eng. dial.
1890 — OLIVER (CROMWELL) to understand → rhyming sl. for ‘tumble’ (Cromwell is
1893 — HAVE to understand, to comprehend; to have a knowledge of → Sc. & Eng. dial.
1894 — JERRY to understand or realize the meaning of something → sl., chiefly Aust. & NZ
1894 — MAKE NEITHER MANE NOR TAIL OF A THING to make neither head nor tail of it; to not understand → Sc.
1896 — GET NEXT TO to understand or realize the meaning of something → US sl.
1896 — GET WISE (TO) to understand or realize the meaning of something → sl., orig. US
1897 — UNDERCOMESTUMBLE → UNDERCUMSTUMBLE to understand; generally used facetiously → Eng. dial.
1897 — UNDERCUMSTAND to understand → Eng. dial.
1898 — CAPASS to understand → Eng. dial. (Bk.)
..L19 — MALUM to understand → army sl.
..L19 — TAKE A DROP TO to realize, to understand → sl.
..20C — ACE IN to understand → US sl.
1900 — FASTEN ON to come to a binding understanding or agreement → Eng. dial. (Bk.)
1900 — MAKE NEITHER END NOR SIDE OF to make nothing of, to fail to understand → Eng. dial. (Bk.)
1902 — HEAR to understand → Eng. dial. (Bk.)
1902 — INSENSE to understand → Eng. dial. (Bk.)
1905 — TAKE IN to understand → Eng. dial. (Bk.)
1905 — UNDERCUMFUND to understand → Eng. dial. (Bk.)
1907 — GET to understand or realize the meaning of something → sl.
1908 — BE JERRY TO to understand or realize the meaning of something → US sl.
1910 — EARWIG to understand → rhyming sl. for ‘twig’
1914 — HAVE SOMEONE TAPED to completely understand someone → sl.
1919 — TAKE A JERRY TO to understand or realize the meaning of something → Aust. & NZ sl.
1919 — WISE UP (TO) to understand or realize the meaning of something → sl., orig. & chiefly US
1922 — COTTON ON (TO) to understand or realize the meaning of something → sl.
1928 — EDZACT to reason out; also, to understand fully → Amer. dial.
1934 — FACULTY to understand, to comprehend → Amer. dial.
1938 — COLLAR to understand something; to grasp something
1938 — GET THE PICTURE to understand, to grasp a situation → sl.
1938 — KNOW THE SCORE to understand, to grasp the essentials of the present situation → sl.
1938 — LATCH to understand → US sl.
1939 — CLICK to suddenly understand → sl.
1939 — DIG to regard favourably; to like, to understand, to appreciate; to approve of; to enjoy → orig. US
1940 — COP to understand, to ‘get’ → African-American sl.
1940 — WRAP UP to thoroughly understand → World War II Aust. Air Force usage
1941 — COLLY to understand, to comprehend
1947 — COLLAR THE JIVE to understand what is being said → US sl.
1947 — BOOT to understand → US sl. (Bk.)
1947 — CLOCK THE ACTION to understand → US sl. (Bk.)
1947 — CLUTCH to understand → US sl. (Bk.)
1947 — DIG THE JIVE to understand → US sl. (Bk.)
1947 — LATCH ON (TO) to understand or realize the meaning of something → US sl. (Bk.)
1947 — LATCH THE JIVE to understand → US sl. (Bk.)
1949 — GET THE DRIFT to understand; to follow the direction of a discussion, argument, etc.
1950 — FERSTEH to understand → Amer. dial.
1950 — GET WITH IT to understand → US sl.
1950 — HAVE IT COVERED to understand a person and accept their position → sl., orig. African-American
1953 — CARVE SOMEONE’S KNOB to make someone understand → US sl.
1955 — FAG-END to have only a partial or muddled understanding of something that has been said → US sl.
1960 — MARK SOMEONE’S CARD to realize, to see and understand → sl.
1965 — CAPISH to understand, to comprehend → Amer. dial.
1965 — COMPREE to understand
1966 — CUT to understand
1966 — GET ONE’S ARMS AROUND to gain control of, be able to manage a difficult talk, situation, etc.; to fully understand and deal with a complex issue or problem → colloq.
1966 — SUSS (OUT) to understand or realize the meaning of something → Brit. sl.
1970 — HACK to accomplish or understand a problem → US sl. (Bk.)
1971 — GORK to understand; to comprehend; to speak on the same level (Bk.)
1972 — GET A HANDLE ON SOMETHING to acquire the means of understanding or of forming an opinion about something → sl., orig. US
1974 — BOTTLE TOP to catch, gain, or understand something → UK rhyming sl. on ‘cop’
1979 — KNOW ONE’S NUMBER to understand a person, to assess a situation → sl.
1980 — BIC to understand → US military in Vietnam usage
1980 — SIGHT to understand → Bahamas
1980 — FAIL to fail to understand, to be unable to understand → US students’ sl.
1989 — GET YOUR ARMS AROUND to grasp the meaning of → US sl.
1990 — TIPPLE to appreciate; to understand; to work out → sl.
1990 — VIOLET CRUMBLE to understand → Aust. rhyming sl. for ‘tumble’
1992 — COME A TUMBLE to detect something; to understand something → UK rhyming sl. for ‘rumble’
1999 — OVERSTAND to completely understand or have a profound knowledge of → African-American sl.
2000 — UNDERDIG to understand fully → African-American sl.
2006 — FEEL to understand someone → US sl. (Bk.)
2006 — GROK to understand something; to appreciate someone or something; to relate to someone or something → US sl. (Bk.)