obtuse Antonyms

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