foolish

adj

1. incautious, imprudent, indiscreet, irresponsible, injudicious; unwise, ill-considered, ill-suited, ill-advised, impolitic; impetuous, impulsive, hasty, short-sighted, heedless, unheeding; foolhardy, headlong, rash, brash, unwary; thoughtless, careless, reckless; spontaneous, unpremeditated, sudden, abrupt, precipitate.

2. absurd, inane, pointless, fatuous, senseless, nonsensical, Inf. damfool, Inf. damfoolish, tomfoolish, Scot, and North Eng. glaikit, Sl. cockeyed; poppy-cockish, Sl. cockamamie, amphigoric; ridiculous, de-risible, risible, laughable, ludicrous, Sl. for the birds; comical, funny, farcical, humorous, droll; asinine, anserine, idiotic, Inf. moronic, imbecilic; childish, puerile, green, immature; crazy, crazed, Sl. kooky, Scot. doiled, mad, wild, insane, demented; daft, Inf. daffy, crackbrained, Inf. nutty; peculiar, strange, odd; All Sl. balmy, dippy, batty, cuckoo, buggy, screwy, wacky, goofy, loony.

3. weak-minded, simple, simple-minded, birdbrained; featherheaded, featherbrained, rattleheaded, rattlebrained; light-minded, light-headed, Inf. dizzy, Inf. footling; muddled, muddleheaded, addlebrained, addlepated; absent-minded, scatterbrained, confused, bemused; feeble-minded, deficient, subnormal, retarded; dull, vapid, Inf. dopey, insensate, Inf. dumb; dull-witted, dim-witted, slow-witted, half-witted, witless, unwitty; harebrained, giddy, mercurial, reckless, erratic, unstable, harum-scarum; stupid, unintelligent, mindless, fatuitous, brainless, slow; dense, thick, thickheaded, thick-skulled, thick-witted, obtuse, stolid, lumpish, blunt; blockheaded, boneheaded, block- ish, doltish; empty-headed, blank, vacant, vacuous.

4. unreasonable, irrational, illogical, meaningless; preposterous, extravagant, excessive; haphazard, aimless, driftless, unconnected, groundless; inappropriate, inept, improper; incongruous, inconsistent.

5. trifling, petty, nugatory, frothy, frivolous, shallow; unimportant, inconsequential, immaterial, inconsiderable, insignificant; petty, picayune, trivial, measly, paltry; small, minor, slight, meager.