Where does “zweifelhaft” come from?

zweifelhaft (German) comes from German Zweifel, from Middle High German zwīvel, from Old High German zwīfal, from Proto-West Germanic twīfl, from Proto-Germanic twīflaz, from Proto-Indo-European dwóh₁ — two.

zweifelhaft (German): doubtful, dubious, questionable

Definitions

  1. doubtful, dubious, questionable

Ancestry of “zweifelhaft”, step by step

StepLanguageWordMeaning
1GermanZweifeldoubt
2Middle High Germanzwīvel—
3Old High Germanzwīfaltwo-fold
4Proto-West Germanictwīfldoubt
5Proto-Germanictwīflazdoubt
6Proto-Indo-Europeandwóh₁two

Words derived from “zweifelhaft”

Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Germanic twīflaz →Every word from Proto-West Germanic twīfl →