Where does “fjellmarkmus” come from?

fjellmarkmus (Norwegian Nynorsk) comes from Norwegian Nynorsk mus, from Old Norse mús, from Proto-Germanic mūs, from Proto-Indo-European múh₂s — mouse.

fjellmarkmus (Norwegian Nynorsk): a tundra vole, "Microtus oeconomus"

Definitions

  1. a tundra vole, "Microtus oeconomus"

Ancestry of “fjellmarkmus”, step by step

fjellmarkmus traces back through 3 separate lines of ancestry.

via Norwegian Nynorsk mus

StepLanguageWordMeaning
1Norwegian Nynorskmusmouse; pussy; computer mouse
2Old Norsemús—
3Proto-Germanicmūsmouse
4Proto-Indo-Europeanmúh₂smouse

via Norwegian Nynorsk fjell

StepLanguageWordMeaning
1Norwegian Nynorskfjella mountain
2Old Norsefjallmountain
3Proto-Germanicfelląskin, hide
4Proto-Indo-Europeanpel-to cover, to wrap; skin, hide, cloth; to fold

via Norwegian Nynorsk mark

StepLanguageWordMeaning
1Norwegian Nynorskmarka worm; land, ground, field; old Norwegian coin
2Old Norsemark—
3Proto-Germanicmarkąmark, sign, stamp
4Proto-Indo-European*mórǵsboundary, border
Every word from Proto-Indo-European múh₂s →Every word from Proto-Germanic mūs →Every word from Old Norse mús →