Obtuse. a. [Compar. Obtuser (; superl. Obtusest.]
Etymology: [L. obtusus, p.p. of obtundere to blunt: cf. F. 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; dull; stupid; as, obtuse senses. Milton.
3. Dull; deadened; as, obtuse sound. Johnson.
Shades of meaning
Fernald lists obtuse only as an antonym, under sagacious.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given