Adjective obtuse has 4 senses
- obtuse - of an angle; between 90 and 180 degrees
Antonym: acute
- obtuse - of a leaf shape; rounded at the apex
Antonym: compound (indirect, via simple)
- obtuse, purblind - lacking in insight or discernment; "too obtuse to grasp the implications of his behavior"; "a purblind oligarchy that flatly refused to see that history was condemning it to the dustbin"- Jasper Griffin
Antonym: discerning (indirect, via undiscerning)
- dense, dim, dull, dumb, obtuse, slow - slow to learn or understand; lacking intellectual acuity; "so dense he never understands anything I say to him"; "never met anyone quite so dim"; "although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray; "dumb officials make some really dumb decisions"; "he was either normally stupid or being deliberately obtuse"; "worked with the slow students"
Antonym: smart (indirect, via stupid)
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