Where does “yester” come from?

yester (Middle English) comes from Old English geostran, from Proto-Germanic gistr-, from Proto-Indo-European dʰǵʰyes-, from Proto-Indo-European dʰeǵʰ- — day.

Ancestry of “yester”, step by step

StepLanguageWordMeaning
1Old Englishgeostranyesterday
2Proto-Germanicgistr-yesterday
3Proto-Indo-Europeandʰǵʰyes-yesterday, the day before
4Proto-Indo-Europeandʰeǵʰ-day

Words derived from “yester”

Every word from Proto-Indo-European dʰeǵʰ- →Every word from Proto-Indo-European dʰǵʰyes- →Every word from Proto-Germanic gistr- →