Etymology tree Proto-Indo-European *rewh₁-der. Proto-Balto-Slavic *arwis Proto-Indo-European *-nós Proto-Balto-Slavic *-inas Proto-Slavic *-ьnъ Proto-Slavic *õrvьnъ Old Polish równy Polish równy Proto-Slavic *-o- Old Polish -o- Polish -o- Proto-Indo-European *wert-der.? Proto-Germanic *wértos Proto-Germanic *werþaz Old High German werd Middle High German wert German wertbor. Polish wart…