追本溯源 [－－－－]

Jyutping zeoi1 bun2 sou3 jyun4
Pinyin zhuī běn sù yuán

Definitions (Wiktionary)
  1. phrase, idiomatic
    to trace to the source; to trace to the origin
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）

追本溯源 [－－－－]

Jyutping
Pinyin zhuī běn sù yuán

Definitions (CC-CEDICT)
  1. to trace sth back to its origin