Where does “einst” come from?

einst (Middle High German) comes from Old High German einēst, from Old High German ein, from Proto-West Germanic ain, from Proto-Germanic ainaz, from Proto-Indo-European óynos — one; single.

Ancestry of “einst”, step by step

StepLanguageWordMeaning
1Old High Germaneinēstonce
2Old High Germaneinone; only
3Proto-West Germanicainone
4Proto-Germanicainazone; some
5Proto-Indo-Europeanóynosone; single

Words derived from “einst”

Every word from Proto-Indo-European óynos →Every word from Proto-Germanic ainaz →Every word from Proto-West Germanic ain →