Where does “sth₂-ró-s” come from?

sth₂-ró-s (Proto-Indo-European) comes from Proto-Indo-European steh₂- — to stand.

Ancestry of “sth₂-ró-s”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	steh₂-	to stand

sth₂-ró-s — Etymology, Origin & Word History | Etymology Explorer