root out

动词 root out:

1. pull up by or as if by the roots
   同义词：uproot, extirpate, deracinate
2. destroy completely, as if down to the roots
   同义词：uproot, eradicate, extirpate, exterminate

1. It is necessary to root out corruption in government.
   铲除政府内部地腐败现象很有必要。
2. It is vain to attempt to root out heresy by force.
   试图用暴力消除异端邪说是徒劳的。
3. I managed to root out a copy of the document.
   我好不容易才找到了文件的副本。