Where does “strṓmə” come from?

strṓmə (Proto-Hellenic) comes from Proto-Indo-European sterh₃-, from Proto-Indo-European ster- — sterile, infertile.

Ancestry of “strṓmə”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	sterh₃-	to spread, extend, stretch out
2	Proto-Indo-European	ster-	sterile, infertile

strṓmə — Etymology, Origin & Word History | Etymology Explorer