Where does “бескрајност” come from?
бескрајност (Serbo-Croatian) comes from Serbo-Croatian бе̏скра̄ј, from Serbo-Croatian кра̑ј, from Proto-Slavic krajь, from Proto-Slavic krojiti, from Proto-Balto-Slavic krájīˀtei, from Proto-Indo-European kroyh₁-eye-ti, from Proto-Indo-European kroyh₁-, from Proto-Indo-European kroh₁y- — to sift, to separate.
бескрајност (Serbo-Croatian): infinity, endlessness
Ancestry of “бескрајност”, step by step