以牙還牙 的英文怎麼說?

[1] take revenge; revenge; avenge[2] retaliate[3] tit for tat[4] An eye for an eye, a tooth for a tooth.[5] Get back at somebody; get somebody back[6] get even

get even 是最廣泛也最簡單的說法。以下針對 revenge, avenge, vengeance 做詳細的說明。

revenge 最常當名詞使用，如以下:
I will take revenge on him for stealing my girlfriend. 我要對他報仇，因為他偷了我的女友
I will get revenge on him for stealing my girlfriend. 我要對他報仇，因為他偷了我的女友
A told B to take revenge for him by killing C. A 請 B 殺了 C 來為 A 報仇
He took revenge for his father's death on his uncle. 他為了父親的死向叔叔報仇

注意，要說「向」誰報仇，英文用 on. 如果不需要說向誰報仇，也可以省略 on，如以下:
I will get revenge.
I will take revenge.

revenge 很少當作動詞使用，如以下:
I will revenge myself on him in the most bloody way. 我要向他報仇

avenge 永遠都當動詞使用，如以下:
He avenged his father's death on his uncle. 他為了父親的死向叔叔報仇

vengeance 永遠都當名詞使用，如以下:
He planned to take/wreak vengeance on her for the bad things she had done to him.

[1]有程度較嚴重的意思, 不像其它可以形容比較輕微的事件. [4]是正統的美國成語, 可用在很多不同的情況. [5]最普遍, 通常指人跟人之間的互動的以牙還牙. get him back 可指將他奪回, 也可指向他報復, 必須看上下文. [6]通常程度輕微.