re·fund 
(rĭ-fŭnd, rēfŭnd′)
(rĭ-fŭnd, rēfŭnd′)v. re·fund·ed, re·fund·ing, re·funds
v.tr.
To give back, especially money; return or repay: refunded the purchase price.
v.intr.
To make repayment.
n. (rēfŭnd′)
1. A repayment of funds.
2. An amount repaid.
[Middle English refunden, from Old French refunder, from Latin refundere : re-, re- + fundere, to pour; see gheu- in the Appendix of Indo-European roots.]
re·funda·ble adj.
re·funder n.
re·fundment n.