Where does “flaggermus” come from?

flaggermus (Norwegian Bokmål) comes from German Fledermaus, from Middle High German vledermūs, from Old High German fledarmūs, from Old High German mūs, from Proto-West Germanic mūs, from Proto-Germanic mūs, from Proto-Indo-European múh₂s — mouse.

flaggermus (Norwegian Bokmål): a bat small flying mammal

Definitions

  1. a bat small flying mammal

Ancestry of “flaggermus”, step by step

StepLanguageWordMeaning
1GermanFledermausmicrobat; bat
2Middle High Germanvledermūs—
3Old High Germanfledarmūs—
4Old High Germanmūsmouse
5Proto-West Germanicmūsmouse
6Proto-Germanicmūsmouse
7Proto-Indo-Europeanmúh₂smouse
Every word from Proto-Indo-European múh₂s →Every word from Proto-Germanic mūs →Every word from Proto-West Germanic mūs →