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Jyutping ho2 ging6
Pinyin kě jìng

Definitions (Wiktionary)
  1. adv
    vigorously, to the utmost

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Jyutping ho2 ging6
Pinyin kě jìn

Definitions (CC-CEDICT)
  1. vigorously
  2. to the utmost
  3. to the best of one's ability