[--]

Jyutping gan1 gau3
Pinyin gēn jiù

Definitions (Wiktionary)
  1. verb
    to thoroughly investigate; to get to the bottom of

[--]

Jyutping gan1 gau3
Pinyin gēn jiū

Definitions (Wiktionary)
  1. verb
    to thoroughly investigate; to get to the bottom of
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)

根究 [--]

Jyutping
Pinyin gēn jiū

Definitions (CC-CEDICT)
  1. to investigate (sth) thoroughly
  2. to get to the bottom of
Examples (Wiktionary)
  1. Mandarin
    穷根究底
    窮根究底
    qióng gēn jiū dǐ
    • to dig into the very roots of the matter