唇齿 chúnchǐ lips and teeth Definitions Defs Origin Strokes Stroke Words Sentences Sents 唇齿相依 chúnchǐxiāngyī closely related literally "as close as lips and teeth"; used to describe two parties that are closely related and mutually dependent for their survival唇齿音 chúnchǐyīn labiodental a consonant sound produced by the upper teeth and the lower lip