repay
re-pay
verb
To do something good or bad in return for an action or kindness.
"He repaid her kindness with a thoughtful gift."
verb
To pay back money owed or return a favour to someone.
"I must repay the loan by Friday."
Thesaurus
Synonyms: rejoin, return, retort, riposte, come back, requite, reward, pay back, refund, give back