obtuse
adjectiveUK /əbˈtjuːs/
US /əbˈtuːs/
Slow to understand things; not quick to catch on.
He was too obtuse to notice that everyone was joking.
RELATED WORDS
OTHER MEANINGS
2. An angle greater than 90 degrees but less than 180 degrees.
The triangle has one obtuse angle of 120 degrees.
3. Blunt or not sharp at the end.
The leaf has an obtuse tip rather than a pointed one.
4. Not sensitive or perceptive; lacking sharpness of feeling.
His obtuse remarks hurt her feelings without him realizing it.