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Jyutping pui4 taai3 zi2 duk6 syu1
Pinyin péi tài zǐ dú shū

Definitions (CC-CANTO)
  1. accompanying a child or a young person to study; fat chance – stands no chance of winning when compared with other competitors in a competition; to join in something (even if it is not relevant to them) just to keep someone company; to describe the candidates who know that they have no chance of passing even before sitting the exams
Definitions (粵典–words.hk)
  1. 動詞
    充當​陪​襯​;​做大​配角
    to be a sidekick; to be a supporting act. Literally: to be the study companion of the prince
    • 我都係陪太子讀書啫,你先係今日主角。
      我都系陪太子读书啫,你先系今日主角。
      ngo5 dou1 hai6 pui4 taai3 zi2 duk6 syu1 ze1, nei5 sin1 hai6 gam1 jat6 zyu2 gok3.
      I'm just the sidekick, you are the main character today.
  2. 動詞
    指家長​陪​子女​讀書​應付​功課
    (of parents) to study with their princes (children)
    • 今日佢要陪太子讀書。
      今日佢要陪太子读书。
      gam1 jat6 keoi5 jiu3 pui4 taai3 zi2 duk6 syu1.
      Today she needs to study with her prince.
Examples (粵典–words.hk)
  1. Cantonese
    我都系陪太子读书啫,你先系今日主角。
    我都係陪太子讀書啫,你先係今日主角。
    ngo5 dou1 hai6 pui4 taai3 zi2 duk6 syu1 ze1, nei5 sin1 hai6 gam1 jat6 zyu2 gok3.
    • I'm just the sidekick, you are the main character today.
  2. Cantonese
    今日佢要陪太子读书。
    今日佢要陪太子讀書。
    gam1 jat6 keoi5 jiu3 pui4 taai3 zi2 duk6 syu1.
    • Today she needs to study with her prince.