Where does “vojьskъ” come from?

vojьskъ (Proto-Slavic) comes from Proto-Slavic vojь, from Proto-Indo-European woyh₁-o-s, from Proto-Indo-European weyh₁- — to chase, pursue; to suppress, persecute.

Ancestry of “vojьskъ”, step by step

StepLanguageWordMeaning
1Proto-Slavicvojьsoldier; curving, turn
2Proto-Indo-Europeanwoyh₁-o-s—
3Proto-Indo-Europeanweyh₁-to chase, pursue; to suppress, persecute
Every word from Proto-Indo-European weyh₁- →Every word from Proto-Indo-European woyh₁-o-s →Every word from Proto-Slavic vojь →