thickheaded Antonyms

as smart as a whip savvy wise talented sound smart sharp-witted sharp sensible sagacious resourceful rational knowledgeable insightful as sharp as a tack as sharp as a razor able to understand quickly mentally acute extremely clever able to think quickly as sharp as a needle agile enough whip-smart scholared quick-thinking quick-witted quick proficient gifted genius educated clever canny brilliant bright brainy astute alert acute ingenious intellectual piquant percipient perceptive nimble logical knowing keen judicious inventive