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Jyutping mat6 wui2
Pinyin mì huì

Definitions (Wiktionary)
  1. verb
    to meet in secret
  2. noun
    secret meeting

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Jyutping mat6 wui6
Pinyin mì huì

Definitions (CC-CEDICT)
  1. secret meeting
  2. to meet secretly
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)