Where does “подмышка” come from?

подмышка (Russian) comes from Russian мы́шка, from Russian мышь, from Old East Slavic мꙑшь, from Proto-Slavic myšь, from Proto-Balto-Slavic *mū́ˀšis, from Proto-Indo-Iranian múHs, from Proto-Indo-European múh₂s — mouse.

подмышка (Russian): armpit, underarm

Definitions

  1. armpit, underarm

Ancestry of “подмышка”, step by step

StepLanguageWordMeaning
1Russianмы́шка"mouse", meaning "muscle"
2Russianмышьmouse
3Old East Slavicмꙑшьmouse
4Proto-Slavicmyšьmouse
5Proto-Balto-Slavic*mū́ˀšismouse
6Proto-Indo-IranianmúHsmouse
7Proto-Indo-Europeanmúh₂smouse
Every word from Proto-Indo-European múh₂s →Every word from Proto-Indo-Iranian múHs →Every word from Proto-Balto-Slavic *mū́ˀšis →