Synonyms of imbecilic

1 Syllable

daft, mad, dull, weak

2 Syllables

wacky, tomfool, kooky, dotty, silly, duller, simple, foolish, fatuous, witless, zany, stupid, loony, doltish, nutty, dullest, absurd, nerdy, loopy, nescient, brainless, mindless, dippy, daffy, jerky, crazy

3 Syllables

unstudious, stupidest, ignorant, inanest, insane, imprudent, softheaded, nitwitted, fantastic, indiscreet, half-baked, lunatic, incautious, senseless, inane, short-sighted, idiotic, unwise, ludicrous, fatheaded, moronic, half-witted, unearthly, thick-headed, squirrelly

4 Syllables

irrational, ill-advised, imbecile, unscholarly, ridiculous, uninstructed, nonsensical, preposterous, injudicious, cockamamie, harebrained, asinine, feebleminded

5 Syllables

unreasonable, unintelligent, ill-considered, unknowledgeable, unintellectual