谁知道英文怎么表达引申意义的“双刃剑”

[好心分手]

？

 

[haoren1]

double edged sword.

 

[某某]

double edged sword?

 

[好心分手]

哦，thx

 

[challenger]

最初由 某某 发布
double edged sword?

忘了个"-": double-edged sword