repay in WordNet English dictionary

1. answer back
   retort  come back  repay  return  riposte  rejoin 
   
2. pay back
   "Please refund me my money"
   refund  return  repay  give back 
   
3. act or give recompense in recognition of someone's behavior or actions
   reward  repay  pay back 
   
4. make repayment for or return something
   requite  repay