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Jyutping bat6 gwaa3
Pinyin bá guà

Definitions (Wiktionary)
  1. verb, Min-Nan
    to tell someone's fortune; to divine (usually using the eight divinatory trigrams of the Book of Changes)
    (syn.) 占卦, 卜问, 擺卦仔, 做卦, 算卦, 摆卦仔, 卜問, 打卦, 卜卦