Where does “non-refundable” come from?

non-refundable (English) comes from English refundable, from English refund, from Middle English refunden, from Old French refondre, from Latin refundere, from Latin refundo, from Latin rĕ-, from Latin prōdūcō — passed , crossed.

Ancestry of “non-refundable”, step by step

StepLanguageWordMeaning
1EnglishrefundableAble to be refunded in case of customer...
2EnglishrefundTo return (money) to (someone); to reimburse
3Middle Englishrefunden
4Old Frenchrefondre
5Latinrefunderepresent active infinitive of refundō;...
6LatinrefundoI pour back, pour out
7Latinrĕ-back, backwards
8Latinprōdūcōto lead or bring forth, forward or out
9Latinprō-forward direction, forward movement
10Proto-Italic*pro-pro- see the Latin entry for further meanings
11Proto-Indo-Europeanpro-toward, forward
12Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
13Proto-Indo-Europeanper-before, in front; first; to go through
14Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European pr̥tós
non-refundable — Etymology, Origin & Word History | Etymology Explorer