quick-witted Antonyms

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