An "eye for an eye" is a proverbial saying that advocates the principle of retaliation for a wrongdoing. This phrase is often used to imply that a person should be punished with the same action that they have committed. Several synonyms for this phrase include a tit for tat, retaliate, strike back, vengeance, and retribution. The phrase "tit for tat" means to do something in return, especially when responding to a negative action. Similarly, the word retaliate means to take action against someone in response to a perceived wrongdoing. The term strike back implies a forceful response, while vengeance and retribution refer to punishment or retaliation for a wrong done.