pay back

(noun) financial return or reward (especially returns equal to the initial investment). Synonyms: payback.

(noun) the act of taking revenge (harming someone in retaliation for something harmful that they have done) especially in the next life. Synonyms: vengeance, retribution, payback. Examples: "Vengeance is mine; i will repay, saith the lord"--romans 12:19." "For vengeance i would do nothing. this nation is too great to look for mere revenge"--james garfield." "He swore vengeance on the man who betrayed him." "The swiftness of divine retribution."

(verb) act or give recompense in recognition of someone's behavior or actions. Synonyms: reward, repay, pay back.

(verb) take vengeance on or get even. Synonyms: pay back, pay off, get, fix. Examples: "We'll get them!." "That'll fix him good!." "This time i got him."