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Jyutping hak1 fu2
Pinyin kē kǔ

Definitions (Wiktionary)
  1. adj, of life
    basic; frugal
    (syn.) 𧺤儉, 抾拾, 克己, 节约, 俭约, 粒积, 儉樸, 節儉, 节俭, 简省, 粒積, 俭朴, 俭, 仔細, 簡省, 𧺤俭, 樸素, 節約, 儉, 仔细, 朴素, 儉約, 节省, 節省, 做人家, 儉省, 俭省
  2. adj
    industrious; assiduous; diligent
    (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, 勤快, 耐劳, 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
  3. adv
    industriously; assiduously; diligently; hard
    • 刻苦學習
      刻苦学习
      kè kǔ xué xí
      to study hard
  4. verb, dialectal
    to treat harshly
    (syn.) 苛待

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Jyutping haak1 fu2
Pinyin kè kǔ

Definitions (粵典–words.hk)
  1. 形容詞
    好​勤力​同​辛苦​噉
    assiduous; painstaking
    • 刻苦學習
      刻苦学习
      haak1 fu2 hok6 zaap6
      to study assiduously
    • 刻苦耐勞
      刻苦耐劳
      hak1 fu2 noi6 lou4
      work very hard
  2. 形容詞
    好​慳​;​好樸素
    frugal
    • 生活刻苦
      生活刻苦
      sang1 wut6 haak1 fu2
      to lead a simple and frugal life

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Jyutping hak1 fu2
Pinyin kè kǔ

Definitions (CC-CEDICT)
  1. hardworking
  2. assiduous
Definitions (CC-CANTO)
  1. (adjective) Arduous (work, etc.)
Definitions (粵典–words.hk)
  1. 形容詞
    好​勤力​同​辛苦​噉
    assiduous; painstaking
    • 刻苦學習
      刻苦学习
      haak1 fu2 hok6 zaap6
      to study assiduously
    • 刻苦耐勞
      刻苦耐劳
      hak1 fu2 noi6 lou4
      work very hard
  2. 形容詞
    好​慳​;​好樸素
    frugal
    • 生活刻苦
      生活刻苦
      sang1 wut6 haak1 fu2
      to lead a simple and frugal life
Definitions (Wiktionary)
  1. adj, of life
    basic; frugal
    (syn.) 𧺤儉, 抾拾, 克己, 节约, 俭约, 粒积, 儉樸, 節儉, 节俭, 简省, 粒積, 俭朴, 俭, 仔細, 簡省, 𧺤俭, 樸素, 節約, 儉, 仔细, 朴素, 儉約, 节省, 節省, 做人家, 儉省, 俭省
  2. adj
    industrious; assiduous; diligent
    (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, 勤快, 耐劳, 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
  3. adv
    industriously; assiduously; diligently; hard
    • 刻苦學習
      刻苦学习
      kè kǔ xué xí
      to study hard
  4. verb, dialectal
    to treat harshly
    (syn.) 苛待
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Definitions (HSK3.0)
  1. HSK3 七一九级词汇表 #2397
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    你得学习刻苦。
    你得學習刻苦。
    nǐ dé xué xí kè kǔ 。
    • You must study hard.
  2. Mandarin
    他比您更刻苦。
    他比您更刻苦。
    tā bǐ nín gèng kè kǔ 。
    • He's even more hardworking than you are.
  3. Mandarin
    她比您更刻苦。
    她比您更刻苦。
    tā bǐ nín gèng kè kǔ 。
    • She's even more hardworking than you are.
Examples (粵典–words.hk)
  1. Cantonese
    刻苦学习
    刻苦學習
    haak1 fu2 hok6 zaap6
    • to study assiduously
  2. Cantonese
    刻苦耐劳
    刻苦耐勞
    hak1 fu2 noi6 lou4
    • work very hard
  3. Cantonese
    生活刻苦
    生活刻苦
    sang1 wut6 haak1 fu2
    • to lead a simple and frugal life
  4. Cantonese
    佢系一个刻苦耐劳嘅员工,相信老板好快会升佢职。
    佢係一個刻苦耐勞嘅員工,相信老闆好快會升佢職。
    keoi5 hai6 jat1 go3 hak1 fu2 noi6 lou4 ge3 jyun4 gung1, soeng1 seon3 lou5 baan2 hou2 faai3 wui5 sing1 keoi5 zik1
    • He is an assiduous employee. It is believed that he will get promoted soon.
Examples (Wiktionary)
  1. Mandarin
    刻苦学习
    刻苦學習
    kè kǔ xué xí
    • to study hard