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Jyutping biu2 sou2
Pinyin biǎo sǎo

Definitions (CC-CEDICT)
  1. wife of older male cousin via female line
Definitions (CC-CANTO)
  1. the wife of an elder cousin
Definitions (粵典–words.hk)
  1. 名詞
    表哥​或者​表弟​嘅​老婆
    the wife of a male cousin
Definitions (Wiktionary)
  1. noun
    cousin-in-law; cousin's wife (wife of mother's sibling's or father's sister's son older than oneself)
    (syn.) 表兄嫂, 阿嫂 face-to-face, 阿嫂 dated, 表嫂嫂, 表嫂, 表阿嫂