Synonym of knuckleheaded

Adjective

Having or showing a lack of intellect
stupid dumb dense brainless mindless obtuse unintelligent unsmart dull half-witted vacuous witless boneheaded dim doltish dopey fatuous lamebrained oafish simple slow thick thickheaded bonehead chuckleheaded lamebrain opaque airheaded birdbrained dopy dorky dunderheaded gormless lunkheaded pinheaded senseless softheaded bubbleheaded soft brain-dead dim-witted slow-witted thick-witted weak-minded empty-headed foolish idiotic moronic imbecilic daft dozy silly ignorant wooden-headed cretinous pea-brained dull-witted vapid muttonheaded dippy bovine slow on the uptake simple-minded imbecile crazy asinine fat-headed soft in the head naive dof inane pig-ignorant not the full shilling dotish blockheaded simpleminded dunce-like gullible thick as two short planks chowderheaded barmy blockish feebleminded as thick as two short planks unreasoning half-baked unwise stolid sluggish glaikit wooden unthinking dead from the neck up thick-skulled goofy tomfool thoughtless divvy harebrained daffy thick-headed dotty scatty featherheaded scatterbrained uncomprehending feather-brained insensitive shallow ill-advised lumpish braindead deficient loopy illiterate uneducated feeble-minded clueless clownish screwy unschooled untaught imperceptive giddy puerile hebetudinous crass cloddish damfool imprudent lethargic torpid injudicious halfwitted vacant laughable unreasonable irrational dimwitted fool ridiculous boorish Boeotian woodenheaded insensate nitwitted numskulled not intelligent thick as mince short-sighted very stupid slow on uptake mentally deficient hare-brained mentally handicapped nonliterate immature childish unlearned benighted ill-mannered analphabetic uninstructed crackpot unread unlettered mad rude untutored dark rattlebrained blind unperceptive unimaginative stupefied credulous feeble nonsensical absurd anencephalic anencephalous numbskulled comatose heavy slumberish thick-skinned impassive fatheaded loggerheaded clottish inept jerky sappy dummy impolitic risible foolishly stupid not bright backward unintellectual log-headed shortsighted pointless superficial duncelike batty dappy nonrational surd idiotical boobish fallacious unconsidered invalid weak unreasoned notional buffoonish hebete cockamamy dizzy frivolous featherbrained skittish ditzy flighty not with it unresponsive limited out to lunch indiscreet ludicrous ill-considered pie-faced negligent careless soppy without thought know-nothing pea-brain neglectful forgetful inattentive unmindful mooning rash unaware spaced-out out daydreaming moony out of it nutty wacky preposterous insane lunatic cuckoo kooky loony zany whacky balmy reckless looney kookie foolhardy irresponsible screwball cockeyed crackbrained illogical incautious oblivious inexperienced green impractical unwitting uninformed innocent unsound unconscious potty insensible unenlightened untrained unknowledgeable heedless fantastic nescient in the dark misguided meaningless uninitiated unconversant improvident cockamamie derisible misinformed infantile uncultured impulsive apprenticed uncultivated unsuspecting inappropriate futile bizarre addle-brained blind to deranged empty inadvisable crackers mental nuts cracked bonkers farcical hasty unknowing unworkable ill-conceived impracticable insipid brutish wacko lifeless retarded incognizant absent-minded nerdy unearthly indelicate outrageous unscholarly inanimate unacquainted fruitless blunt cock-eyed wet behind the ears purposeless blundering unstudious coarse gross madcap complacent callow idiotish squirrelly bone-headed inert erratic unstable smoothbrained addle-pated trifling worthless phlegmatic placid donkeyish obstinate fanciful fantastical extravagant unrefined somnolent unpractical tearaway unsophisticated derisive derisory comical incompetent idiot unreal as daft as a brush unrealistic unworldly inactive listless inconsistent mentally slow unqualified pathetic unhinged vain wishy-washy flat innocuous slothful chowderhead sheepheaded gratuitous poor wild eccentric feather-headed touched smooth-brained grotesque weird strange peculiar incongruous odd queer doolally gonzo devoid of intelligence undesirable unfortunate muddle-headed a brick short of a load as green as grass two sandwiches short of a picnic bad risky aberrant ill-informed mechanical off your head off your trolley unversed indiscriminate wanton off the air up the pole instinctive brainsick cranky demented crazed loco maniac wud maniacal bedlam meshugge bughouse psychotic slang fruity unbalanced haywire bats gaga moonstruck whacko psycho meshuga certifiable inadvertent barbarous barbaric flakey not all there looney tunes bedlamite not quite right flaky loony tunes fried unintended precipitate remiss automatic non compos mentis uncalled for spontaneous involuntary reflex unpremeditated intuitive unintentional blank in the ozone off the wall out of one's gourd expressionless unmeant untactful feckless napping unheeding inexpressive deadpan vague dreaming dreamy inscrutable poker-faced absent abstracted glassy numb catatonic stony emotionless uninterested idle incurious motionless indifferent unexpressive

Antonym of knuckleheaded

knuckleheaded Idiom, Proverb

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