UNPRINCIPLED
ADJECTIVES
– IMPROBOUS wicked, unprincipled …1657 obs. rare
– LEWD of persons, their actions, etc.: bad, vile, evil, wicked, base; unprincipled, ill-conditioned; good-for-nothing; worthless …c1386 obs.
– RAGGILY rascally, unprincipled …Bk1905 Eng. dial.
– ROGUISH acting like a rogue; unprincipled, dishonest …L16
– ROGUY acting like a rogue; unprincipled, dishonest …L16 obs.
NOUNS, PERSON
– BELIAL a wicked and unprincipled person …Bk1895
– BLACKGUARD a man coarse in speech, and offensive in manner; a scamp; a scoundrel; an unprincipled or disreputable fellow …1732
– JACK-LEG an incompetent, unskilled, unscrupulous, or unprincipled worker or professional person, esp. a quack doctor, a crooked lawyer, or a hypocritical preacher – a bungling workman …1853 US sl.
– NAAWT a nowt; a man of no principles; an undesirable acquaintance; a ne’er-do-well …Bk1905 Eng. dial.
– RACK a dissolute, unprincipled young man; a rake; a wag …1724 Sc.
– RENEGATE a reprobate, an unprincipled person, a rogue, a rascal …Bk1904 Eng. dial.
– ROGUE a dishonest or unprincipled person, esp. a man …L16
– SNOLLYGOSTER a pretentious, boastful fellow; a shrewd, unprincipled fellow, especially a politician …1846 US sl.
– WANGLER one who lacks integrity; an unprincipled person …1912
– WANT-GRACE one who lacks grace; an unprincipled person; a reprobate, a scamp …1603 obs.
VERBS
– JACKLEG to act in an incompetent, unskilled or unprincipled way …M19 US sl.
Lexicophilia 