(bound form) used in the word 钌铞儿 liào​diào​r for a door latch or hook

(bound form) Only used in certain compounds such as 钌铞儿 liào​diào​r or 铞子 diào​zi

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.