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Jyutping sit3 mat6
Pinyin xiè mì

Definitions (CC-CEDICT)
  1. to leak secrets
Definitions (Wiktionary)
  1. verb
    to leak secrets
Definitions (兩岸三地生活差異詞語彙編—Two Shores Three Places)
  1. 日常用語:臺
    洩密
  2. 日常用語:陸
    洩密、失密