repay

repay (http://definr.com/repay)

     v 1: pay back; "Please refund me my money" [syn: refund, return,
           give back]
     2: make repayment for or return something [syn: requite]
     3: act or give something in recognition of someone's behavior
        [syn: reward, pay back]
     4: answer back [syn: retort, come back, return, riposte,
         rejoin]