obtuse
adjective uk/əbˈtʃuːs/ us/ɑːbˈtuːs/
(ANGLE)
mathematics specialized（角度）钝角的
(of an angle) more than 90° and less than 180°
Compare: acute adjective (ANGLE)reflex adjective
(STUPID)
formal愚笨的;迟钝的;迟缓的
stupid and slow to understand, or unwilling to try to understand
The answer's obvious - or are you being deliberately obtuse? 答案很明显——要不你们就是在故意装傻？