Where does “zwei” come from?

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

Ancestry of “zwei”, step by step

StepLanguageWordMeaning
1Old High Germanzwei—
2Proto-Germanictwaitwo
3Proto-Indo-Europeandwóh₁two

Words derived from “zwei”

Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Germanic twai →Every word from Old High German zwei →