Where does “крајње” come from?
крајње (Serbo-Croatian) comes 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-, from Proto-Indo-European kreh₁y- — to sift, to separate.
крајње (Serbo-Croatian): extremely, utterly
Ancestry of “крајње”, step by step