Obtuse
Obtuse , adjective
[Latin obtusus, past participle of obtundere to blunt: compare French obtus. See Obtund.]
1.
Not pointed or acute; blunt; -- applied esp. to angles greater than a right angle, or containing more than ninety degrees.
2.
Not having acute sensibility or perceptions; not alert, especially to the feelings of others; dull; stupid; as, obtuse senses. — Milton
3.
Dull; deadened; as, obtuse sound. — Johnson