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Jyutping jan4 gaan1 zing1 faat3
Pinyin rén jiān zhēng fā

Definitions (CC-CEDICT)
  1. to vanish
  2. to disappear from the face of the earth
Definitions (粵典–words.hk)
  1. 動詞
    消失​得​無影​無​蹤​,​就​好似​水蒸​發​咗​咁
    to disappear without trace; to vanish
    • 近排咁多人喺依頭人間蒸發,會唔會係有連環殺手呀?
      近排咁多人喺依头人间蒸发,会唔会系有连环杀手呀?
      gan6 paai4 gam3 do1 jan4 hai2 ji1 tau4 jan4 gaan1 zing1 faat3, wui5 m4 wui5 hai6 jau5 lin4 waan4 saat3 sau2 aa3?
      So many disappeared without a trace around here recently. I wonder if there's a serial killer out there.
Definitions (Wiktionary)
  1. phrase, idiomatic
    inexplicably out of sight; to vanish into thin air
Definitions (Kaifangcidian)
  1. 不見蹤影 – 不见踪影
  2. 無影無蹤 – 无影无踪
  3. 石沉大海
  4. 泥牛入海
Examples (粵典–words.hk)
  1. Cantonese
    近排咁多人喺依头人间蒸发,会唔会系有连环杀手呀?
    近排咁多人喺依頭人間蒸發,會唔會係有連環殺手呀?
    gan6 paai4 gam3 do1 jan4 hai2 ji1 tau4 jan4 gaan1 zing1 faat3, wui5 m4 wui5 hai6 jau5 lin4 waan4 saat3 sau2 aa3?
    • So many disappeared without a trace around here recently. I wonder if there's a serial killer out there.
  2. Cantonese
    人间蒸发
    人間蒸發
    jan4 gaan1 zing1 faat3
    • to disappear without trace
  3. Cantonese
    楼主好耐冇回复人,我怀疑佢已经人间蒸发。
    樓主好耐冇回復人,我懷疑佢已經人間蒸發。
    lau4 zyu2 hou2 noi6 mou5 wui4 fuk6 jan4, ngo5 waai4 ji4 keoi5 ji5 ging1 jan4 gaan1 zing1 faat3.
    • The original poster hasn't replied us for so long that he may have vanished from this world.
Examples (Wiktionary)
  1. Mandarin
    人间蒸发
    人間蒸發
    rén jiān zhēng fā
    • (of a human) to disappear from the public