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Jyutping hak1 sai3 lik6
Pinyin hēi shì lì

Definitions (Wiktionary)
  1. noun
    criminal force

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Jyutping haak1 sai3 lik6
Pinyin hēi shì li

Definitions (粵典–words.hk)
  1. 名詞
    同黑​社會​有​關​嘅​勢​力
    influence from triad or gangs
    • 黑勢力入侵校園。
      黑势力入侵校园。
      Triad forces invaded into school campus.

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Jyutping hak1 sai3 lik6
Pinyin hēi shì li

Definitions (粵典–words.hk)
  1. 名詞
    同黑​社會​有​關​嘅​勢​力
    influence from triad or gangs
    • 黑勢力入侵校園。
      黑势力入侵校园。
      Triad forces invaded into school campus.

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Jyutping hak1 sai3 lik6
Pinyin hēi shì4li

Definitions (CC-CANTO)
  1. criminal syndicate [written and colloquial]
Examples (粵典–words.hk)
  1. Cantonese
    黑势力入侵校园。
    黑勢力入侵校園。
    • Triad forces invaded into school campus.