a.
1.
Blunt.
2.
Dull, stupid, stolid, doltish, blockish, stockish, heavy, slow, unintelligent, unintellectual, dull-witted, blunt-witted.
3.
Dull, obscure, deadened, muffled.
OBTUSE
Meaning of OBTUSE in English
Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012