obtuse

US /ɑːbˈtuːs/
UK /ɑːbˈtuːs/
"obtuse" picture
1.

annoyingly insensitive or slow to understand

:
•
He was too obtuse to grasp the subtle humor of the situation.
•
Don't be so obtuse; the answer is obvious!
:
dullstupidslow-witteddenseunintelligent
:
sharpacuteperceptiveintelligentclever
2.

(of an angle) greater than 90° and less than 180°

:
•
An obtuse angle is wider than a right angle.
•
The triangle had one obtuse angle and two acute angles.
:
acuteright