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breathing; respiration
走った後の息遣いが荒い。
Breathing is heavy after running.
隣の部屋から息遣いが聞こえた。
Breathing could be heard from the next room.
耳を澄ますと動物の静かな息遣いが聞こえてきた。
Listening carefully, the quiet breathing of the animal could be heard.