Where does “iforthen” come from?

iforthen (Middle English) comes from Old English ġeforþian, from Old English forþian, from Old English forþon, from Old English fōr, from Proto-West Germanic furi, from Proto-Germanic furi, from Proto-Indo-European preh₂-, from Proto-Indo-European per- — passed , crossed.

Ancestry of “iforthen”, step by step

StepLanguageWordMeaning
1Old Englishġeforþianto further, accomplish, afford
2Old Englishforþianto further, accomplish, afford
3Old Englishforþonbecause, since
4Old Englishfōrjourney; going, course, journey
5Proto-West Germanicfurifor; before; forward
6Proto-Germanicfurifor, before; before, forward
7Proto-Indo-Europeanpreh₂-before, in front
8Proto-Indo-Europeanper-before, in front; first; to go through
9Proto-Indo-Europeanpr̥tóspassed , crossed

Words derived from “iforthen

Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Proto-Indo-European preh₂-