Where does “sréwmn̥” come from?

sréwmn̥ (Proto-Indo-European) comes from Proto-Indo-European srew-, from Proto-Indo-European ser- — to flow; to guard; to bind, to tie together.

Ancestry of “sréwmn̥”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	srew-	to flow, stream
2	Proto-Indo-European	ser-	to flow; to guard; to bind, to tie together

sréwmn̥ — Etymology, Origin & Word History | Etymology Explorer