徒兒 [－儿]

Jyutping tou4 ji4
Pinyin tú ér

Definitions (粵典–words.hk)
  1. 名詞
    （​古裝劇​入面​）​徒弟​同師​父講​嘢​嘅​時​候​對​自己​嘅​稱​呼
    (used in costume dramas) the term for a student to address oneself when speaking to one's master