改口费 gǎikǒufèi red envelope for calling parents-in-law Mom and Dad Origin Definitions Defs Strokes Stroke Words Sentences Sents 改口 gǎikǒu to change how one addresses someone To change the name or title used for a person, such as when a new spouse begins calling their parents-in-law 爸爸 bàba and 妈妈 māma费 費 fèi noun fee (bound form) fee; expenses; charge; dues