Synonyms of obtuse

1. obtuse (vs. acute): usage: of an angle; between 90 and 180 degrees
2. obtuse, simple (vs. compound), unsubdivided: usage: (of a leaf shape) rounded at the apex
3. obtuse, purblind, undiscerning (vs. discerning): usage: 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
4. dense, dim, dull, dumb, obtuse, slow, stupid (vs. smart): usage: 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"