Where does “usitandus” come from?

usitandus (Latin) comes from Latin usitor, from Latin ūtor, from Proto-Slavic *ǫtorъ, from Proto-Slavic torъ, from Proto-Slavic terti, from Proto-Indo-European terh₁- — to rub, turn; to drill, pierce.

Definitions

Ancestry of “usitandus”, step by step

StepLanguageWordMeaning
1LatinusitorI use habitually
2Latinūtorto use, make use of, employ
3Proto-Slavic*ǫtorъcroze
4Proto-Slavictorъpaddock, pen
5Proto-Slavictertito rub, to scrape; to polish
6Proto-Indo-Europeanterh₁-to rub, turn; to drill, pierce
Every word from Proto-Indo-European terh₁- →Every word from Proto-Slavic terti →Every word from Proto-Slavic torъ →