root and branch
从根本上，彻底地
书面·表达彻底消除
英文释义
to completely eradicate or eliminate something, usually referring to a problem or issue
例句
The company decided to root and branch reform its outdated policies.
典故来源
源自树木的根和枝，比喻彻底、全面地消除问题，不留残余。