root out

US /ruːt aʊt/
UK /ruːt aʊt/
"root out" picture
1.

根除, 查明

find and get rid of a person or thing that is unwanted

:
The police are trying to root out corruption in the department.
警方正試圖根除部門內的腐敗。
We need to root out the cause of the problem.
我們需要查明問題的根源。