quick-witted Antonyms

as thick as two short planks wooden-headed thickheaded boneheaded dopey empty-headed barmy witless vacuous thick stupid moronic birdbrained dumb as a bag of hammers not the full shilling dunce-like soft in the head slow on the uptake muttonheaded lamebrained unintelligent imbecilic dunderheaded dumb as a box of rocks slow-witted slow dozy doltish dim dense daft cretinous crazy chuckleheaded brainless bovine dull dull-witted dumb simple-minded obtuse mindless imperceptive imbecile ignorant idiotic half-witted foolish fatuous asinine