Where does “Vervierfacher” come from?

Vervierfacher (German) comes from German vervierfachen, from German vierfach, from German vier, from Middle High German vier, from Old High German fior, from Proto-West Germanic feuwar, from Proto-Germanic fedwōr, from Proto-Indo-European kʷetwóres — and.

Ancestry of “Vervierfacher”, step by step

StepLanguageWordMeaning
1Germanvervierfachento quadruple, to quadruplicate, to multiply by four
2Germanvierfachfourfold, quadruple
3Germanvierfour
4Middle High Germanvier
5Old High Germanfiorfour
6Proto-West Germanicfeuwarfour
7Proto-Germanicfedwōrfour
8Proto-Indo-Europeankʷetwóresfour
9Proto-Indo-Europeankʷe-and
Every word from Proto-Indo-European kʷe-Every word from Proto-Indo-European kʷetwóresEvery word from Proto-Germanic fedwōr