Obtuse Definition & Meaning - Merriam-Webster
Obtuse comes from a Latin word meaning "dull" or "blunt." It can describe a geometric angle that is not acute or a person who is mentally " dull ." In addition, obtuse can mean "hard to comprehend."

OBTUSE | English meaning - Cambridge Dictionary
He has been obtuse, difficult, totally irrational and unreasonable to the detriment of the whole of his country.

OBTUSE Synonyms: 194 Similar and Opposite Words - Merriam-Webster
How does the adjective obtuse differ from other similar words? The words blunt and dull are common synonyms of obtuse. While all three words mean "not sharp, keen, or acute," obtuse implies such bluntness as makes one insensitive in perception or imagination.

Obtuse - definition of obtuse by The Free Dictionary
obtuse - 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 | definition in the Cambridge English Dictionary
To be hackneyed, if you're a hammer (or anything that's obtuse), everything looks like a nail.

Obtuse - Definition, Meaning & Synonyms - Vocabulary.com
The adjective obtuse is good for describing someone slow on the uptake: "Don't be so obtuse: get with the program!"

OBTUSE definition and meaning | Collins English Dictionary
Someone who is obtuse has difficulty understanding things, or makes no effort to understand them.

OBTUSE Definition & Meaning | Dictionary.com
not sharp, acute, or pointed; blunt in form. (of a leaf, petal, etc.) rounded at the extremity. indistinctly felt or perceived, as pain or sound. His opinions may have been obtuse, but he was grounded in facts and reason.

Obtuse Definition & Meaning - YourDictionary
Obtuse definition: Lacking quickness of perception or intellect.

obtuse - Wiktionary, the free dictionary
obtuse (comparative obtuser or more obtuse, superlative obtusest or most obtuse) (now chiefly botany, zoology) Blunt; not sharp, pointed, or acute in form. For we see a Feather or a Rush drawn along the Lip or Cheek, doth tickle; whereas a thing more , or a touch more hard, doth not.