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Jyutping gau3 ming4
Pinyin jiù míng

Definitions (Wiktionary)
  1. verb, literary
    to prove through investigation; to find out; to ascertain
    (syn.) 廓清, 明確, 搞清楚, 澄清, 弄清, 理清, 弄清楚, 搞清, 明确, 查明, 推求

[--]

Jyutping gau3 ming4
Pinyin jiū míng

Definitions (Wiktionary)
  1. verb, literary
    to prove through investigation; to find out; to ascertain
    (syn.) 廓清, 明確, 搞清楚, 澄清, 弄清, 理清, 弄清楚, 搞清, 明确, 查明, 推求