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Jyutping gaai3 sam1
Pinyin jiè xīn

Definitions (CC-CEDICT)
  1. vigilance
  2. wariness
Definitions (粵典–words.hk)
  1. 名詞
    警戒​;​唔​會​輕易​相信​任何​嘢
    vigilance; wariness; watchfulness; on one's guard
    • 呢件事太唔尋常,你要保持戒心。
      呢件事太唔寻常,你要保持戒心。
      ni1 gin6 si6 taai3 m4 cam4 soeng4, nei5 jiu3 bou2 ci4 gaai3 sam1.
      This is too abnormal, you need to keep alert.
Definitions (Wiktionary)
  1. noun
    wariness; vigilance
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    呢件事太唔寻常,你要保持戒心。
    呢件事太唔尋常,你要保持戒心。
    ni1 gin6 si6 taai3 m4 cam4 soeng4, nei5 jiu3 bou2 ci4 gaai3 sam1.
    • This is too abnormal, you need to keep alert.