[--]

Jyutping caa4 gau3
Pinyin chá jiù

Definitions (Wiktionary)
  1. verb
    to look into and find out
    (syn.) 追

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Jyutping caa4 gau3
Pinyin chá jiū

Definitions (CC-CEDICT)
  1. to follow up a study
  2. to investigate
Definitions (粵典–words.hk)
  1. 動詞
    調查​明白​,​追究​責任
    to investigate and ascertain
Definitions (Wiktionary)
  1. verb
    to look into and find out
    (syn.) 追