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Jyutping baak3 zou2
Pinyin bó zǔ

Definitions (Wiktionary)
  1. noun
    granduncle; great-uncle (paternal grandfather's elder brother)
    (syn.) 伯祖父, 伯公
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)