The story
- Latin · derived fromrefundere
- Old French · derived fromrefondre
- Middle English · inherited fromrefunden
- English todayrefund
From Middle English refunden, refounden, from Old French refondre, refonder, refunder (“to restore; pay back”), from Latin refundere; prefix re- (“re-”) + fundere (“to pour”): compare French refondre, refonder. Not related to fund. See fuse (“to melt”), and compare refound (“to cast again”), and refuse.
Etymology from Wiktionary, CC BY-SA 4.0.