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Jyutping syu3 zi2
Pinyin shù zǐ

Definitions (CC-CEDICT)
  1. bastard
  2. commoner son of royalty
Definitions (Wiktionary)
  1. noun
    illegitimate son; bastard son
  2. noun, historical
    child of a concubine (inferior but not necessarily illegitimate in historical polygynous society)
Examples (粵典–words.hk)
  1. Cantonese
    庶子
    庶子
    syu3 zi2
    • son born of a concubine