Where does “oberżystka” come from?

oberżystka (Polish) comes from Polish oberżysta, from French aubergiste, from French auberge, from Old Occitan alberga, from Frankish harjabergu, from Proto-West Germanic hari, from Proto-Germanic harjaz, from Proto-Indo-European kóryos — army.

Ancestry of “oberżystka”, step by step

StepLanguageWordMeaning
1Polishoberżystainnkeeper, publican
2Frenchaubergisteinnkeeper, landlord
3Frenchaubergehostel; prison
4Old Occitanalbergacamp, hut
5Frankishharjabergubarracks; shelter; army camp, barracks; refuge,...
6Proto-West Germanichariarmy
7Proto-Germanicharjazarmy; army leader; commander; warrior
8Proto-Indo-Europeankóryoswar; troops; army; war, troops
9Proto-Indo-Europeanḱer-to grow, to make grow, to nourish; to plait,...
10Proto-Indo-Europeankr̥-to turn, to bend
11Proto-Indo-Europeanker-army
Every word from Proto-Indo-European ker-Every word from Proto-Indo-European kr̥-Every word from Proto-Indo-European ḱer-