zwölfmonatlich (German) comes from German monatlich, from German Monat, from Middle High German mānōt, from Old High German mānōd, from Proto-West Germanic mānōþ, from Proto-Germanic mēnōþs, from Proto-Indo-European mḗh₁n̥s, from Proto-Indo-European meh₁- — to measure.
zwölfmonatlich (German): twelve-monthly occurring once every twelve months
Definitions
twelve-monthly occurring once every twelve months
Ancestry of “zwölfmonatlich”, step by step
zwölfmonatlich traces back through two separate lines of ancestry.