劝退的英文：
be expelled
persuade somebody to quit

参考例句：

He should be expelled, not just persuaded to quit.
不是劝退的问题，要开除。

expelled是什么意思：
v. 开除；驱逐

He was expelled from the club.
他被俱乐部除名了。

The student have been expelled for cheating.
这学生因为作弊被开除。

They both take in and expel matter.
他们既吸取物质也排放物质。

persuade是什么意思：
v. 说服；劝说

They persuaded us to unarmed the weapons.
他们劝我们卸下武器。

We persuade him to try again.
我们劝他再度尝试。

It is very difficult to persuade the imperislists to disarm.
说服帝国主义裁军是很难的。

somebody是什么意思：
pron. 某人，有人
n. 重要人物

to sit for somebody
为某人做临时保姆

fall to somebody by assignment or lot.
通过分配或者划分使某人垮台。

He is somebody in this city.
他在这个城市是个重要人物。