Where does “sráwtas” come from?

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

Ancestry of “sráwtas”, step by step

StepLanguageWordMeaning
1Proto-Indo-Iraniansráwtasriver; current, torrent
2Proto-Indo-Europeansrew-to flow, stream
3Proto-Indo-Europeanser-to flow; to guard; to bind, to tie together
Every word from Proto-Indo-European ser- →Every word from Proto-Indo-European srew- →Every word from Proto-Indo-Iranian sráwtas →