唇齿相依 chúnchǐxiāngyī closely related Origin Definitions Defs Strokes Stroke Words Sentences Sents 唇齿 唇齒 chúnchǐ interdependent extremely close relationship; used to describe partners or neighbors who are interdependent and share common interests相依 xiāngyī to depend on each other to be interdependent; to rely on one another