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Jyutping jan4 meng6 gwaan1 tin1
Pinyin rén mìng guān tiān

Definitions (粵典–words.hk)
  1. 語句
    好​重要​,​同​人​嘅​性命​有​關​嘅​事​,​關​係​住​一個​人​嘅​生死
    human life is of paramount importance; as a matter of life and death
    • 呢件事人命關天㗎,快啲報警啦。
      呢件事人命关天㗎,快啲报警啦。
      ni1 gin6 si6 jan4 meng6 gwaan1 tin1 gaa3, faai3 di1 bou3 ging2 laa1.
      This is a matter of life and death, call the police now!

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Jyutping jan4 ming6 gwaan1 tin1
Pinyin rén mìng guān tiān

Definitions (CC-CEDICT)
  1. human life is beyond value (idiom)
Definitions (Wiktionary)
  1. phrase, idiomatic
    a case involving human life is to be treated with the utmost care
  2. phrase, idiomatic
    of life and death; of vital importance
Examples (粵典–words.hk)
  1. Cantonese
    呢件事人命关天㗎,快啲报警啦。
    呢件事人命關天㗎,快啲報警啦。
    ni1 gin6 si6 jan4 meng6 gwaan1 tin1 gaa3, faai3 di1 bou3 ging2 laa1.
    • This is a matter of life and death, call the police now!