refund :资金偿还; 偿还数额;退还、偿还refund

refund [ˈri:fʌnd]
n.资金偿还; 偿还数额
vt.退还; 归还或偿还
vi.进行偿还

例句:
Your services are badly, refund me my money!
服务太差,退钱!

They demand a refund on unsatisfactory goods.
他们对不满意的货品要求退款。

We'll refund your money if you aren't satisfied.
你若不满意,我们愿意退款给你。