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Jyutping kan4 faai3
Pinyin qín kuai

Definitions (Wiktionary)
  1. adj, informal
    diligent; hardworking
    (syn.) 坚苦, 用功, 勤恳, 勤勞, 勤奮, 勤劳, 力落, 发狠, 骨力, 發狠, 勤懇, 巴巴結結, 耐劳, 刻苦, 勤奋, 亹亹, 勤勉, 巴劫, 勤谨, 勤力, 巴巴结结, 急計, 耐勞, 努力, 勤謹, 堅苦, 急计

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Jyutping kan4 faai3
Pinyin qín kuài

Definitions (CC-CEDICT)
  1. diligent; hardworking
Definitions (粵典–words.hk)
  1. 形容詞
    做事​盡力​而且​有效率
    diligent; hard working and efficient
    • 佢真係一個勤快嘅員工。
      佢真系一个勤快嘅员工。
      He is such a hardworking and efficient worker.
Definitions (Wiktionary)
  1. adj, informal
    diligent; hardworking
    (syn.) 坚苦, 用功, 勤恳, 勤勞, 勤奮, 勤劳, 力落, 发狠, 骨力, 發狠, 勤懇, 巴巴結結, 耐劳, 刻苦, 勤奋, 亹亹, 勤勉, 巴劫, 勤谨, 勤力, 巴巴结结, 急計, 耐勞, 努力, 勤謹, 堅苦, 急计
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Definitions (HSK3.0)
  1. HSK3 七一九级词汇表 #3322
Examples (粵典–words.hk)
  1. Cantonese
    佢真系一个勤快嘅员工。
    佢真係一個勤快嘅員工。
    • He is such a hardworking and efficient worker.