tooth; teeth

(of teeth) to chatter or knock together due to extreme fear or cold, usually in the phrase 牙齿捉对儿厮打 yá​chǐ​zhuō​duì​r​sī​dǎ

A suffix attached to a word to form a retroflex ending, often indicating a small size, a sense of familiarity, or turning a word into a noun.

to fight or tussle with each other; to maul one another or be it by grappling or striking