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Jyutping fu2 fu2
Pinyin kǔ kǔ

Definitions (CC-CEDICT)
  1. strenuously
  2. persistently
  3. hard
  4. painful
Definitions (Wiktionary)
  1. adv
    painfully; with a lot of difficulty
  2. adv
    painstakingly; persistingly; strenuously
Examples (粵典–words.hk)
  1. Cantonese
    佢用辛辛苦苦储落嚟嘅七万蚊,再加埋佢老豆俾佢嘅六百四十五万,终于买咗佢人生嘅第一嚿砖头喇!
    佢用辛辛苦苦儲落嚟嘅七萬蚊,再加埋佢老豆俾佢嘅六百四十五萬,終於買咗佢人生嘅第一嚿磚頭喇!
    keoi5 jung6 san1 san1 fu2 fu2 cou5 lok6 lai4 ge3 cat1 maan6 man1, zoi3 gaa1 maai4 keoi5 lou5 dau6 bei2 keoi5 ge3 luk6 baak3 sei3 sap6 ng5 maan6, zung1 jyu1 maai5 zo2 keoi5 jan4 sang1 ge3 dai6 jat1 gau6 zyun1 tau4 laa3!
    • With the 70000 dollars that he painstakingly saved, plus the 6.45M dollars given by his father, he finally managed to buy his first apartment.
  2. Cantonese
    不过一场相识,沈教授眼见郑先生喺度苦苦R捞,都无个 RA 位安置佢。
    不過一場相識,沈教授眼見鄭先生喺度苦苦R撈,都無個 RA 位安置佢。
    yue:不過一場相識,沈教授眼見鄭先生喺度苦苦R撈,都無個 RA 位安置佢。
    • Watching Mr. Cheng looking for jobs desperately, Professor Shen did not even offer him a research assistant position because they were acquaintances only.
  3. Cantonese
    我苦苦修炼咗十年,依次你仲唔死!
    我苦苦修煉咗十年,依次你仲唔死!
    ngo5 fu2 fu2 sau1 lin6 zo2 sap6 nin4, ji1 ci3 nei5 zung6 m4 sei2!
    • I have been preparing for the entire decade, this time, I shall be the end of you!