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Jyutping duk6 zi2
Pinyin dú zǎi

Definitions (Wiktionary)
  1. noun, Cantonese
    only son
    (syn.) 單丁子, 独生子, 独囝, 独生仔, 单丁, 独子, 獨生子, 独生女, 独生子女, 獨生女, 獨囝, 孤囝, 单丁子, 獨生仔, 單丁, 獨生子女, 獨子

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Jyutping duk6 zai2
Pinyin dú zǎi

Definitions (粵典–words.hk)
  1. 名詞
    屋企​裏​面​唯一​嘅​仔​;​冇​兄弟​姊妹​嘅​男性​(​量​詞​:​個​)
    an only son; the only child (who is male)
  2. 近義詞
    獨子、獨生子
Examples (粵典–words.hk)
  1. Cantonese
    独仔
    獨仔
    duk6 zai1
    • the only son
  2. Cantonese
    佢嘅独仔意外死咗,令佢冇晒指望。
    佢嘅獨仔意外死咗,令佢冇晒指望。
    keoi5 ge3 duk6 zai2 sei2 zo2, ling6 keoi5 mou5 saai3 zi2 mong6
    • Her only son died in an accident and made her completely hopeless.