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Jyutping sing4 hei3
Pinyin chéng qì

Definitions (CC-CEDICT)
  1. to make sth of oneself
  2. to become a person who is worthy of respect
Definitions (Wiktionary)
  1. verb, literally
    to become a useful implement
  2. verb, figuratively
    to grow up to be a talented or useful person
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    我是个不成器的人。
    我是個不成器的人。
    wǒ shì gè bù chéng qì de rén 。
    • I'm a loser.
Examples (粵典–words.hk)
  1. Cantonese
    玉不琢不成器。
    玉不琢不成器。
    • It takes lots of time and hard-work to fulfill a capable person.
Examples (Wiktionary)
  1. Mandarin
    孩子不学好不成器
    孩子不學好不成器
    hái zi bù xué hǎo bù chéng qì
    • child fails to learn from good examples and shows no promise
  2. Mandarin
    孩子不学好不成器。
    孩子不學好不成器。
    hái zi bù xué hǎo bù chéng qì .
    • Children who fail to learn from good examples will not grow up to be useful people.