Synonyms of stupid in English:

stupid


See definition of stupid

adjective

1‘they're not as stupid as they look’

SYNONYMS
unintelligent, ignorant, dense, brainless, mindless, foolish, dull-witted, dull, slow-witted, witless, slow, dunce-like, simple-minded, empty-headed, vacuous, vapid, half-witted, idiotic, moronic, imbecilic, imbecile, obtuse, doltish
gullible, naive
informal thick, dim, dumb, dopey, dozy, crazy, cretinous, birdbrained, pea-brained, pig-ignorant, bovine, slow on the uptake, soft in the head, brain-dead, boneheaded, lamebrained, thickheaded, chuckleheaded, dunderheaded, wooden, wooden-headed, fat-headed, muttonheaded
British informal daft, barmy, not the full shilling, thick as two short planks
North American vulgar slang dumb-ass
ANTONYMS

intelligent, clever, astute

2‘I promised never to make the same stupid mistake again’

SYNONYMS
foolish, silly, unintelligent, idiotic, brainless, mindless, scatterbrained, crackbrained, nonsensical, senseless, irresponsible, unthinking, ill-advised, ill-considered, inept, witless, damfool, unwise, injudicious, indiscreet, short-sighted
inane, absurd, ludicrous, ridiculous, laughable, risible, fatuous, asinine, pointless, meaningless, futile, fruitless, mad, insane, lunatic
informal crazy, dopey, cracked, half-baked, cock-eyed, hare-brained, nutty, derpy, cuckoo, loony, loopy, zany, screwy, off one's head, off one's trolley, out to lunch
British informal daft, potty, dotty, batty, barmy, gormless
Scottish, Northern English informal glaikit
North American vulgar slang half-assed
ANTONYMS

sensible, prudent

3‘all he'd do was sit and drink himself stupid’

SYNONYMS
into a stupor, into a daze, into a state of unconsciousness, into oblivion
stupefied, dazed, groggy, sluggish, semi-conscious, unconscious
ANTONYMS

alert