换口气

Traditional (Taiwan): 換口氣

huànkǒuqi ㄏㄨㄢˋ ㄎㄡˇ ˙ㄑㄧ

    • to change one's tone or stance
    • to change one's mind

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
change one's tone
Meaning
To change one's manner of speaking, attitude or stance; to change one's mind. Neutral.

Sources