obtuse — ONAD

obtuse /əbˈt(y)o͞os, , əbˈt(j)us

, äbˈt(y)o͞os, ɑbˈt(j)us

▸ adjective

1 annoyingly insensitive or slow to understand:

he wondered if the doctor was being deliberately obtuse.

▪ difficult to understand:

some of the lyrics are a bit obtuse.

2 (of an angle) more than 90° and less than 180°:

an obtuse angle of 150°.

3 not sharp-pointed or sharp-edged; blunt:

it had strange obtuse teeth.

– DERIVATIVES
obtusely /əbˈt(y)o͞oslē, , əbˈt(j)usli, äbˈt(y)o͞oslē, ɑbˈt(j)usli/ adverb,obtuseness /əbˈt(y)o͞osnəs, , əbˈt(j)usnəs, äbˈt(y)o͞osnəs, ɑbˈt(j)usnəs/ noun,obtusity /-sitē/ noun

– ORIGIN late Middle English (in obtuse (SENSE 3)): from Latin obtusus, past participle of obtundere ‘beat against’ (see obtund).