尋根

to seek one's roots / to get to the bottom of a matter

to search / to look for / to seek

root / basis / classifier for long slender objects, e.g. cigarettes, guitar strings / CL:條|条[tiao2] / radical (chemistry)

lit. to examine roots and inquire at the base (idiom); to get to the bottom of sth

see 追根溯源[zhui1 gen1 su4 yuan2]