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Jyutping hak1 tin1
Pinyin hēi tiān

Definitions (Wiktionary)
  1. noun
    night; nightfall
    (syn.) 夜晚
  2. name, Hinduism
    Krishna
Examples (粵典–words.hk)
  1. Cantonese
    黑天鹅
    黑天鵝
    haak1 tin1 ngo4
    • black swan