fight fire with fire
成語所屬單字fight
fight fire with fire — 慣用語
1. to use the same methods as your opponent in an argument or competition, especial
1.慣用語
釋義
以牙還牙；以其人之道還治其人之身
to use the same methods as your opponent in an argument or competition, especially when those methods are aggressive or unfair.
例句
When the competitor lowered their prices to steal customers, we decided to fight fire with fire.