Where does “Starobilsk” come from?

Starobilsk (English) comes from Ukrainian Старобі́льськ, from Ukrainian стари́й, from Old East Slavic старъ, from Proto-Slavic starъ, from Proto-Balto-Slavic staʔros, from Proto-Indo-European steh₂-ro-, from Proto-Indo-European steh₂- — to stand.

Ancestry of “Starobilsk”, step by step

StepLanguageWordMeaning
1UkrainianСтаробі́льськ—
2Ukrainianстари́йold, ancient
3Old East Slavicстаръ—
4Proto-Slavicstarъold
5Proto-Balto-Slavicstaʔros—
6Proto-Indo-Europeansteh₂-ro-large, big, thick; old
7Proto-Indo-Europeansteh₂-to stand
Every word from Proto-Indo-European steh₂- →Every word from Proto-Indo-European steh₂-ro- →Every word from Proto-Balto-Slavic staʔros →