退还

退还	tuì huán	to return (sth borrowed etc); to send back; to refund; to rebate
退	tuì	to retreat; to withdraw / to reject; to return (sth) / to decline
还	Huán	surname Huan
还	hái	still / still in progress / still more / yet / even more / in addition / fairly / passably (good) / as early as / even / also / else
还	huán	to pay back / to return