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to shout; to cry (out); to scream; to shriek; to yell; to exclaim
to clamor (for or against); to advocate; to insist; to protest; to appeal
彼は大声で必死に助けを叫んだ。
He shouted desperately for help at the top of his voice.
学生たちが改革を叫び続ける。
Students keep clamoring for reform.
火事だと叫んで、みんなに知らせました。
I shouted 'Fire!' and let everyone know.