difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge; "the professor's lectures were so abstruse that students tended to avoid them"; "a deep metaphysical theory"; "some recondite problem in historiography"
utter in a loud voice; talk in a loud voice (usually denoting characteristic manner of speaking); "My grandmother is hard of hearing--you'll have to shout"
utter a sudden loud cry; "she cried with pain when the doctor inserted the needle"; "I yelled to her from the window but she couldn't hear me"