關天 [关－]

Jyutping gwaan1 tin1
Pinyin guān tiān

Definitions (Wiktionary)
  1. verb
    to be of utmost importance
  2. verb
    to concern the fate or destiny (天命)
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!