unwise

1 showing or marked by a lack of good sense or judgment made the unwise decision to invest in a brand-new company Synonyms absurd, asinine, balmy, brainless, bubbleheaded, cockeyed, crackpot, crazy, cuckoo, daffy, daft, dippy, dotty, fatuous, featherheaded, fool, half-baked, harebrained, half-witted, inept, insane, jerky, kooky (also kookie), loony (also looney), lunatic, lunkheaded, mad, nonsensical, nutty, preposterous, sappy, screwball, senseless, silly, simpleminded, stupid, tomfool, foolish, wacky (also whacky), weak-minded, witless, zanyRelated Words airheaded, birdbrained, boobish, brain-dead, chowderheaded, chuckleheaded, clueless, dense, dim, dim-witted, doltish, dopey (also dopy), dorky [slang], dull, dumb, dunderheaded, empty-headed, fatuous, feebleminded, gormless [chiefly British], idiotic (also idiotical), imbecile (or imbecilic), knuckleheaded, lamebrain (or lamebrained), mindless, moronic, oafish, obtuse, opaque, pinheaded, simple, slow, slow-witted, soft, softheaded, thoughtless, thick, thickheaded, unintelligent, vacuous, witless; fallacious, illogical, invalid, irrational, nonrational, surd, unreasonable, unreasoning, unsound, weak; farcical, laughable, ludicrous, ridiculous; notional; buffoonish, clownish; ill-advised, unconsidered, unreasonedNear Antonyms brainy, bright, clever, intelligent, smart; logical, rational, reasonable, valid; well-advisedAntonyms judicious, prudent, sagacious, sage, sane, sapient, sensible, sound, wise

2 showing poor judgment especially in personal relationships or social situations an unwise urge to confide in total strangers Synonyms brash, graceless, ill-advised, imprudent, inadvisable, indelicate, injudicious, tactless, undiplomatic, indiscreetRelated Words dumb, idiotic (also idiotical), moronic, stupid; careless, heedless, inconsiderate, mindless, thoughtless; ill-mannered, improper, inappropriate, indecorous, unbecoming, uncivil, unseemly; foolish, harebrained, nonsensical, preposterous, senseless, sillyNear Antonyms intelligent, logical, rational, sensible, smart, sound; appropriate, becoming, civil, decorous, proper, seemly; sage, sane, sapientAntonyms advisable, discreet, judicious, prudent, tactful, wise

3 not having or showing a deep understanding of something a stunningly unwise observer of the political scene Synonyms impercipient, insentient, unperceptive, imperceptiveRelated Words undiscriminating; dense, dull, obtuse, sluggish, thickheaded; brainless, dumb, feebleminded, foolish, idiotic (also idiotical), imbecile (or imbecilic), moronic, silly, simple, slow, stupid, thoughtless, unintelligent, witlessNear Antonyms discriminating; acute, perspicacious; brainy, bright, brilliant, clever, intelligent, keen, nimble, quick, quick-witted, smart; cerebral, erudite, learned, literate, scholarly; astute, sharp, shrewd; contemplative, reflective, thoughtfulAntonyms discerning, insightful, perceptive, percipient, sagacious, sage, sapient