OBTUSE
dense, dim, dull, dumb, obtuse, slow
(adjective) 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”
obtuse, purblind
(adjective) 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
obtuse
(adjective) of an angle; between 90 and 180 degrees
obtuse
(adjective) (of a leaf shape) rounded at the apex
Source: WordNet® 3.1
Etymology
Adjective
obtuse (comparative obtuser or more obtuse, superlative obtusest or most obtuse)
(now, chiefly, botany, zoology) Blunt; not sharp, pointed, or acute in form.
(botany, zoology) Blunt, or rounded at the extremity.
(geometry, specifically, of an, angle) Larger than one, and smaller than two right angles, or more than 90° and less than 180°.
(geometry, by ellipsis) Obtuse-angled, having an obtuse angle.
Intellectually dull or dim-witted.
Of sound, etc.: deadened, muffled, muted.
Indirect or circuitous.
Synonyms
• (intellectually dull): dense, dim, dim-witted, thick (informal)
• (of a sound): deadened, muffled
• (of a triangle): obtuse-angled
• (now chiefly botany, zoology): blunt, dull
Antonyms
• (intellectually dull): bright, intelligent, on the ball, quick off the mark, quick-witted, sharp, smart
• (deadened, muffled, muted): clear, sharp
• (of an angle): acute
• (of a triangle): acute, acute-angled
• (now chiefly botany, zoology): pointed, sharp
Verb
obtuse (third-person singular simple present obtuses, present participle obtusing, simple past and past participle obtused)
(transitive, obsolete) To dull or reduce an emotion or a physical state.
Anagrams
• buteos
Source: Wiktionary
Ob*tuse". a. [Compar. Obtuser (; superl. Obtusest.] Etym: [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.
Source: Webster’s Unabridged Dictionary 1913 Edition