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Jyutping zi3 zi3
Pinyin zhì zhì

Definitions (Wiktionary)
  1. verb, literary
    to concentrate the mind
  2. verb, literary
    to boost morale
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    他专心致志地学习拉丁语。
    他專心致志地學習拉丁語。
    tā zhuān xīn zhì zhì dì xué xí lā dīng yǔ 。
    • He is absorbed in the study of Latin.
  2. Mandarin
    我们一字不落的,专心致志的听着。
    我們一字不落的,專心致志的聽着。
    wǒ men yī zì bù là de , zhuān xīn zhì zhì de tīng zhe 。
    • We listened carefully in order not to miss a single word.
    • We listened with great care, not missing a single word.
  3. Mandarin
    建夫专心致志地解决数学问题。
    建夫專心致志地解決數學問題。
    jiàn fū zhuān xīn zhì zhì dì jiě jué shù xué wèn tí 。
    • Takeo is engrossed in solving mathematical problems.
Examples (粵典–words.hk)
  1. Cantonese
    佢好专心致志噉做紧份计划书。
    佢好專心致志噉做緊份計劃書。
    keoi5 hou2 zyun1 sam1 zi3 zi3 gam2 zou6 gan2 fan6 gai3 waak6 syu1.
    • She is fully concentrating on doing the proposal.
  2. Cantonese
    专心致志
    專心致志
    zyun1 sam1 zi3 zi3
    • to fully concentrate on something