追根溯源 zhuī gēn sù yuán

DEFINITIONS

  1. to pursue sth back to its origins
  2. to trace back to the source
  3. to get to the bottom of sth

CHARACTERS

追 zhuī
HSK 5
pursue, chase after; expel
根 gēn
HSK 3
root, base(d on); foundation
溯 sù go upstream, go against current; formerly
源 yuán
HSK 5
spring; source, head; surname