Where does “forða” come from?

forða (Old Norse) comes from Proto-Germanic furþōną, from Proto-Germanic furþą, from Proto-Indo-European pr̥to-.

Ancestry of “forða”, step by step

StepLanguageWordMeaning
1Proto-Germanicfurþōnąto go forward, to advance
2Proto-Germanicfurþąforward
3Proto-Indo-Europeanpr̥to-—

Words derived from “forða”

Every word from Proto-Indo-European pr̥to- →Every word from Proto-Germanic furþą →Every word from Proto-Germanic furþōną →