obtuse Antonyms

acute smart quick-witted sharp intelligent bright talented tined tongued spinous spangled trenchant whetted sophic shrewd rational resourceful sagacious sage sagittal sagittate sapient scratching wise jabbing agile enough as sharp as a needle sharp as a needle well-versed able to think quickly extremely clever mentally acute able to understand quickly as sharp as a razor whip-smart sharpened lancinate savvy knowledgeable insightful on the ball quick off the mark quick-thinking razor sharp scholared as sharp as a tack accomplished brilliant canny clear