Where does “старъ” come from?

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

Ancestry of “старъ”, step by step

StepLanguageWordMeaning
1Proto-Slavicstarъold
2Proto-Balto-Slavicstaʔros—
3Proto-Indo-Europeansteh₂-ro-large, big, thick; old
4Proto-Indo-Europeansteh₂-to stand

Words derived from “старъ”

Every word from Proto-Indo-European steh₂- →Every word from Proto-Indo-European steh₂-ro- →Every word from Proto-Balto-Slavic staʔros →