Where does “sъnъ” come from?
sъnъ (Proto-Slavic) comes from Proto-Balto-Slavic supnas, from Proto-Indo-European supnós, from Proto-Indo-European swóp-r̥ ~ swép-n̥s, from Proto-Indo-European swep- — to sleep.
sъnъ (Proto-Slavic): sleep, dream
Ancestry of “sъnъ”, step by step
Words derived from “sъnъ”