Where does “non-revenue” come from?

non-revenue (English) comes from English revenue, from Middle French revenue, from Old French revenir, from Latin revenio, from Latin rĕ-, from Latin prōdūcō, from Latin prō-, from Proto-Italic *pro- — passed , crossed.

Ancestry of “non-revenue”, step by step

StepLanguageWordMeaning
1EnglishrevenueThe income returned by an investment; The total...
2Middle Frenchrevenue
3Old Frenchrevenirto come back, to return
4LatinrevenioI come back, return
5Latinrĕ-back, backwards
6Latinprōdūcōto lead or bring forth, forward or out
7Latinprō-forward direction, forward movement
8Proto-Italic*pro-pro- see the Latin entry for further meanings
9Proto-Indo-Europeanpro-toward, forward
10Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
11Proto-Indo-Europeanper-before, in front; first; to go through
12Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Latin rĕ-
non-revenue — Etymology, Origin & Word History | Etymology Explorer