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refund; repayment; reimbursement
飛行機の返金を求めた。
I requested a refund for the flight.
破損品だったので、店は全額返金した。
Since it was a damaged item, the store issued a full refund.
誤って多く支払ったので、差額が返金された。
Since I overpaid by mistake, the difference was refunded.