Where does “краина” come from?
краина (Old East Slavic) comes from Proto-Slavic krajina, 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-, from Proto-Indo-European kreh₁y- — to sift, to separate.
краина (Old East Slavic): region; state, country
Ancestry of “краина”, step by step
Words derived from “краина”