Where does “Frostwinter” come from?

Frostwinter (German) comes from German frost, from Middle High German vrost, from Old High German frost, from Proto-West Germanic *frost, from Proto-Germanic frustaz, from Proto-Indo-European prustós — frost.

Frostwinter (German): A frosty winter (a winter with very low temperatures, usually below 0 °C)

Definitions

  1. A frosty winter (a winter with very low temperatures, usually below 0 °C)

Ancestry of “Frostwinter”, step by step

Frostwinter traces back through two separate lines of ancestry.

via German frost

StepLanguageWordMeaning
1Germanfrostfrost; freezing weather weather conditions below 0 °C
2Middle High Germanvrost—
3Old High Germanfrostfrost
4Proto-West Germanic*frost—
5Proto-Germanicfrustazcold; frost; freezing weather; frost; rime
6Proto-Indo-Europeanprustósfrost

via German Winter

StepLanguageWordMeaning
1GermanWinterwinter
2Middle High Germanwinterwinter
3Old High Germanwintarwinter
4Proto-West Germanicwintruwinter
5Proto-Germanicwintruzwinter
Every word from Proto-Indo-European prustós →Every word from Proto-Germanic frustaz →Every word from Proto-West Germanic *frost →