Where does “-с” come from?
-с (Russian) comes from Russian су́дарь, from Russian госуда́рь, from Old East Slavic государь, from Old East Slavic господарь, from Proto-Slavic gospodarь, from Proto-Slavic gospodь, from Proto-Balto-Slavic gastipatis, from Proto-Indo-European gʰóstipotis — to drink.
-с (Russian): sir
Ancestry of “-с”, step by step