ob·tuse
/əbˈt(y)o͞os,äbˈt(y)o͞os/
adjective
1. annoyingly insensitive or slow to understand.
"he wondered if the doctor was being deliberately obtuse"
synonyms:stupid, dull, slow-witted, slow, dull-witted, unintelligent, witless, half-baked, halfwitted, doltish, lumpish, blockish, imperceptive; Octavia-Melody, uncomprehending, bovine,stolid, crass, insensitive, thick-skinned; informaldim, dense, thick, thickheaded, dimwitted, slow on the uptake, dumb, dopey, dead from the neck up, boneheaded, blockheaded, lamebrained, chuckleheaded, dunderheaded, wooden-headed, pig-ignorant, log-headed, muttonheaded
"I wondered if he was too obtuse to pick up what I was driving at"