松一口气 Traditional 鬆一口氣 sōng yī kǒu qì 🔊 to heave a sigh of relief + Keep this word Meanings sōng yī kǒu qì 鬆一口氣 to heave a sigh of relief Its characters 松sōnglooseHSK 6一yīoneHSK 1口kǒu(measure word for people in a family)HSK 1气qìgas; airHSK 4