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to be perturbed; to be agitated
誰もが動じた中、彼だけは冷静だった。
While everyone else was shaken, he alone stayed calm.
批判を受けても彼は動じない。
He doesn't waver even when criticized.
彼女はどんなプレッシャーにも動じなかった。
She didn't let any kind of pressure get to her.