叛徒的英文：
traitor
turncoat

A rank traitor
大叛徒

The renegade is the first cousin to a rattlesnake.
叛徒象响尾蛇一样地毒狠。

Their attempt to recapture Calais was foiled thwarted by a traitor.
他们想重新攻取加来的企图被一个叛徒断送了。

Abu Nidal, a Palestinian renegade, died in Baghdad in 2002.
阿布·尼达尔是巴勒斯坦叛徒，他于2002年在巴格达死去。

In your language traitor means betrayer: one is perfidious, treacherous, unfaithful, disloyal
在贵国的语言中，叛徒指的是叛卖者，一个背叛信仰，两面三刀，不忠实，无信无义的人。

The denunciation of a traitor
斥责叛徒

Turn traitor
成为叛徒

All traitorous persons and cliques came to no good end.
所有的叛徒及叛徒集团都没好下场。

They accused him of being a traitor, which he was.
他们指控他是叛徒，他也真是叛徒。

He was a cat in the pan.
他是个叛徒

They zapped the traitor.
他们杀死了这个叛徒。

To proclaim a man (to be) a traitor [that he is' a traitor].
宣布某人为叛徒

They branded him as a traitor.
他们给他加上叛逆者的污名。

The traitors procured the death of the prince.
卖国贼导致了王子之死。

There is a traitor in our midst.
我们中间有个叛徒。

You're a turncoat, a time-server, a shameful, unscrupulous opportunist
你是一个变节分子，是个趋炎附势之徒！是个肆无忌惮不要脸的机会主义者！