imbecile

/ˈɪmbɪsiːl/

DO NOT MAKE SUCH IMBECILE GENERALISATION

noun informal

1. a stupid person.

Synonyms: Fool, idiot, moron, dolt, halfwit, dunce, dullard, blockhead, ignoramus, clod; informaldope, thickhead, ninny, chump, dimwit, dummy, dum-dum, dumb-bell, jackass, bonehead, fathead, numbskull, dunderhead, airhead, pinhead, lamebrain, pea-brain, birdbrain, dipstick, donkey, noodle; informalnit, nitwit, twit, numpty, clot, muppet, plonker, berk, prat, pillock, wally, wazzock, divvy;

I'd have to be an imbecile to do such a thing.

adjective

stupid; idiotic.

Try not to make imbecile remarks.

synonyms: stupid, foolish, idiotic, silly, doltish, half-witted, witless, dull, brainless, mindless.