root word
词根
例句与用法：
It is necessary to root out corruption in government.
铲除政府内部地腐败现象很有必要。
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。
I managed to root out a copy of the document.
我好不容易才找到了文件的副本。
词形变化：
名词: rooter | 动词过去式: rooted | 动词过去分词: rooted | 动词现在分词: rooting | 动词第三人称单数: roots |