obtuse

(a) of an angle; between 90 and 180 degrees
(s) (of a leaf shape) rounded at the apex
(s) 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
purblind,
(s) 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
dumb, slow, dense, dim, dull,

purblind dumb slow dense dim dull

acute

obtund

obtuse angle obtuse-angled triangle obtuse leaf obtusely obtuseness obtuse triangle