To Refund, To Reimburse
transitive verb, godan verb
払い is a "payment" and 戻す is "to return." If you return a payment, you are going to repay, to refund, or to reimburse someone for their payment.
The readings come from 払い and 戻す.
Excuse me, I'd like to refund my Suica because I no longer need it...
Can I get reimbursed for the Korean barbecue I ate during my business trip?
I’m afraid that we cannot refund your deposit since you lost the key.