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to quiet; to calm down; to compose oneself; to settle down
やっと落ち着ける場所を見つけた。
I finally found a place where I could settle down.
まず気持ちを落ち着けてから話し合おう。
Let's calm down first and then talk it over.
深呼吸して心を落ち着けた。
I took a deep breath and calmed myself.