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Jyutping si1 mun4
Pinyin shī mén

Definitions (Wiktionary)
  1. noun
    door or gate of the house of a teacher or master; (by extension) teacher; master
Examples (粵典–words.hk)
  1. Cantonese
    逐出师门
    逐出師門
    zuk6 ceot1 si1 mun4
    • to remove someone from the master's apprenticeship