zweifelsfrei (German) comes from German frei, from Middle High German vrî, from Old High German frī, from Proto-West Germanic frī, from Proto-Germanic frijaz, from Proto-Indo-European priHós, from Proto-Indo-European preyH- — to love, to please.
zweifelsfrei (German): unequivocal, doubtless
Definitions
unequivocal, doubtless
Ancestry of “zweifelsfrei”, step by step
zweifelsfrei traces back through two separate lines of ancestry.