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Jyutping aa3 baak6
Pinyin ā bái

Definitions (Wiktionary)
  1. noun, Hakka
    great-great-grandfather (the father of someone's great-grandparent)
    (syn.) 高祖父, 祖爺, 祖爷
  2. noun, Taishanese
    great-grandmother (particularly paternal grandfather's mother)
  3. noun, Hakka
    great-great-grandmother (grandparent's grandmother)
    (syn.) 祖奶, 高祖母, 婆白