Where does “underarm” come from?

underarm (Swedish) comes from Swedish ärm, from Swedish rörelse, from Swedish -else, from Old Saxon -isli, from Proto-West Germanic -islī, from Proto-West Germanic -ī, from Proto-Germanic -į̄, from Proto-Indo-European -íh₂ — Creates collective nouns, which refer to groups...

underarm (Swedish): forearm

Definitions

  1. forearm

Ancestry of “underarm”, step by step

underarm traces back through two separate lines of ancestry.

via Swedish ärm

StepLanguageWordMeaning
1Swedishärmsleeve; a part of a garment that covers all or...
2Swedishrörelsemovement; a move between points in space;...
3Swedish-elsecreating nouns from verbs
4Old Saxon-isli
5Proto-West Germanic-islīUsed to form nouns from verbs denoting something...
6Proto-West Germanic-ness, -th
7Proto-Germanic-į̄-th
8Proto-Indo-European-íh₂
9Proto-Indo-European-h₂Creates collective nouns, which refer to groups...

via Swedish under

StepLanguageWordMeaning
1Swedishunderunder; below; beneath; during, at the same time...
2Old Swedishunderwonder, miracle; wonderment, awe, marvel
3Old Norseundrwonder; scandal
4Proto-Germanicwundrąwonder, miracle
5Proto-Indo-Europeanwenh₁-to love
Every word from Proto-Indo-European -h₂Every word from Proto-Germanic -į̄Every word from Swedish -else