Where does “krowianka” come from?

krowianka (Polish) comes from Polish krowa, from Old Polish krowa, from Proto-Slavic kòrva, from Proto-Indo-European ḱer-, from Proto-Indo-European kr̥-, from Proto-Indo-European ker- — army.

krowianka (Polish): cowpox

Definitions

cowpox

Ancestry of “krowianka”, step by step

Step	Language	Word	Meaning
1	Polish	krowa	cow
2	Old Polish	krowa	cow
3	Proto-Slavic	kòrva	cow
4	Proto-Indo-European	ḱer-	to grow, to make grow, to nourish; to plait,...
5	Proto-Indo-European	kr̥-	to turn, to bend
6	Proto-Indo-European	ker-	army

Every word from Proto-Indo-European ker- →Every word from Proto-Indo-European kr̥- →Every word from Proto-Indo-European ḱer- →