what is the opposite of obtuse
English Synonyms and Antonyms (0.00 / 0 votes) Rate these synonyms: obtuse. Antonyms: able, acute, apt, clear-sighted, discerning, intelligent, judicious, keen, keen-sighted, keen-witted, perspicacious, quick of scent, quick-scented, rational, sagacious, sage, sensible, sharp, sharp-witted, shrewd, wise. Synonyms: