Where does “down-current” come from?

down-current (English) comes from English current, from Middle English curraunt, from Old French curant, from Old French courre, from Latin currere, from Proto-Indo-European ḱers- — to run.

Ancestry of “down-current”, step by step

down-current traces back through two separate lines of ancestry.

via English current

StepLanguageWordMeaning
1EnglishcurrentThe generally unidirectional movement of a gas or...
2Middle Englishcurraunt
3Old Frenchcurantpresent participle of corre; alternative form of...
4Old FrenchcourreAlternative form of corre; to run
5Latincurreresecond-person singular future passive indicative...
6Proto-Indo-Europeanḱers-to run

via English Down

StepLanguageWordMeaning
1EnglishDownusually known as County Down
2Middle Englishdoundown
3Old Englishdūnhill, down; hill, dune; hill, mountain
4Proto-Germanic*dūnā
5Proto-Celticdūnomstronghold, rampart
6Proto-Indo-Europeandʰewh₂-smoke; mist, haze
Every word from Proto-Indo-European ḱers-Every word from Latin currereEvery word from Old French courre