Where does “zweifach” come from?

zweifach (German) comes from German zwei, from Middle High German zwēne, from Old High German zwēne, from Proto-West Germanic twai-, from Proto-Germanic twai, from Proto-Indo-European dwóh₁ — two.

zweifach (German): twofold, double; dual; duplicate

Definitions

  1. twofold, double; dual; duplicate

Ancestry of “zweifach”, step by step

zweifach traces back through two separate lines of ancestry.

via German zwei

StepLanguageWordMeaning
1Germanzweitwo
2Middle High Germanzwēnetwo
3Old High Germanzwēnetwo
4Proto-West Germanictwai-two
5Proto-Germanictwaitwo
6Proto-Indo-Europeandwóh₁two

via German fach

StepLanguageWordMeaning
1Germanfachsecond-person singular imperative of fachen
2Middle High Germanvach-fold
3Old High Germanfahwall
4Proto-Germanic*fak
5Proto-GermanicfakąAn enclosed or defined space; division;...
6Proto-Indo-Europeanpeh₂ǵ-to attach

Words derived from “zweifach

Every word from Proto-Indo-European dwóh₁