Where does “бын” come from?
бын (Ossetian) comes from Proto-Indo-Iranian bʰudʰnás, from Proto-Indo-European bʰudʰ(m̥)nés, from Proto-Indo-European bʰudʰmḗn, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.
бын (Ossetian): bottom
Ancestry of “бын”, step by step