пра̏во (Serbo-Croatian) comes from Serbo-Croatian пра̏в, from Proto-Slavic pravъ, from Proto-Balto-Slavic prōˀwas, from Proto-Indo-European preh₃-wo-s, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.
пра̏во (Serbo-Croatian): straight