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obtuse /ɑbˈtuːs/  /Brit {scriptainv}bˈtjuːs/

  • adjective
    [more ~; most ~]
    formal :stupid or unintelligent :not able to think clearly or to understand what is obvious or simple
    He is too obtuse to take a hint.
    an incredibly obtuse person
    mathematics :not ending in a sharp point :measuring between 90 degrees and 180 degrees
    an obtuse angle - compare acute 6