Where does “усторобити ся” come from?

усторобити ся (Old East Slavic) comes from Proto-Slavic storbiti, from Proto-Indo-European sterbʰ- — to exert; to become stiff.

Ancestry of “усторобити ся”, step by step

StepLanguageWordMeaning
1Proto-Slavicstorbitito relieve; to heal
2Proto-Indo-Europeansterbʰ-to exert; to become stiff

Words derived from “усторобити ся”

Every word from Proto-Indo-European sterbʰ- →Every word from Proto-Slavic storbiti →
усторобити ся — Etymology, Origin & Word History | Etymology Explorer