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Jyutping jap1 dung6
Pinyin xì dòng

Definitions (Wiktionary)
  1. verb, literary, of lips, usually
    to open and close

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Jyutping jap1 dung6
Pinyin xī dòng

Definitions (CC-CEDICT)
  1. to open and close (the mouth etc)
Definitions (Wiktionary)
  1. verb, literary, of lips, usually
    to open and close
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)