Where does “rainfed” come from?

Rainfed comes from English rain and English fed, where rain derives from Old French resne, from Proto-Germanic regną meaning "to pour," from Proto-Indo-European reǵ-.

rainfed (English): Supplied with water by rain

Definitions

  1. Supplied with water by rain

Ancestry of “rainfed”, step by step

rainfed traces back through two separate lines of ancestry.

via English Fed

StepLanguageWordMeaning
1EnglishFedThe Federal Reserve Board or System
2EnglishfederationAct of joining together into a single political...
3FrenchFédérationfederation
4Latinfoederatiofederation, treaty
5Latin-tiōtion, -ation, -ing
6Latindissertātiō(spoken) dissertation, discourse, disquisition
7Latindissertusarranged, disposed; explained
8Latindissereresecond-person singular future passive indicative...
9Latindis-asunder, apart, in two; reversal, removal;...
10Latincalceusshoe
11Latincalxlimestone; chalk; the finish line
12Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via English rain

StepLanguageWordMeaning
1EnglishrainCondensed water falling from a cloud; Any matter...
2Middle Englishreynrain water falling from a cloud
3Old Englishreġnrain
4Proto-West Germanicregnrain
5Proto-Germanicregnąrain
6Proto-Indo-EuropeanHreǵ-to flow
Every word from Ancient Greek χάλιξ