Where does “unwiter” come from?

unwiter (Middle High German) comes from Old High German unwetar, from Proto-Germanic unwedrą, from Proto-Germanic wedrą, from Proto-Indo-European wedʰrom, from Proto-Indo-European h₂weh₁- — to blow.

Ancestry of “unwiter”, step by step

StepLanguageWordMeaning
1Old High Germanunwetar—
2Proto-Germanicunwedrąbad weather, storm
3Proto-Germanicwedrąweather
4Proto-Indo-Europeanwedʰrom—
5Proto-Indo-Europeanh₂weh₁-to blow
Every word from Proto-Indo-European h₂weh₁- →Every word from Proto-Indo-European wedʰrom →Every word from Proto-Germanic wedrą →