English Idioms About “Parts of the body”
Idiom: An eye for an eye
Meaning: (Also, an eye for an eye and a tooth for a tooth.) said to suggest that punishment should equal the crime. At the root of this principle is that one of the purposes of the law is to provide equitable retribution for an offended party.
Example: In some countries, justice operates on the principle of an eye for an eye. That is, if you kill someone, you desrve to die.