respirasen

form-of imperfect plural subjunctive third-person

respirarの三人称複数接続法過去

English Meaning

third-person plural imperfect subjunctive of respirar

Si ellos respirasen el aire fresco de la montaña, se sentirían rejuvenecidos.

もし彼らが山の新鮮な空気を吸っていれば、若返ったと感じるでしょう。

If they were breathing the fresh mountain air, they would feel rejuvenated.