Where does “drain” come from?

drain (Old French) comes from Old French derrain, from Vulgar Latin deretranus, from Latin dē, from Latin post, from Latin poste, from Proto-Italic posti, from Proto-Indo-European pósti, from Proto-Indo-European pós — afterwards, post; by, at.

Ancestry of “drain”, step by step

StepLanguageWordMeaning
1Old Frenchderrainfinal, last; last
2Vulgar Latinderetranusto hinder
3Latinof; concerning; about
4Latinpostbehind; after, since, besides, except; behind,...
5Latinposteablative singular of postis
6Proto-Italicpostibehind, after
7Proto-Indo-Europeanpóstiafter
8Proto-Indo-Europeanpósafterwards, post; by, at

Words derived from “drain

Every word from Proto-Indo-European pósEvery word from Proto-Indo-European póstiEvery word from Proto-Italic posti