Proto-Slavic *vorgъ

→ Belarusian вораг (inherited)

→ Czech vrah (inherited)

→ Old Church Slavonic врагъ (inherited)

→ Hungarian varázsol (derived)

→ Macedonian враг (inherited)

→ Old East Slavic врагъ (derived)

→ Old East Slavic ворогъ (inherited)

→ Polish wróg (inherited)

→ Polish wróżyć (mention)

→ Russian враг (derived)

→ Russian вражда (mention)

→ Russian ворог (inherited)

→ Serbo-Croatian враг (inherited)

→ Serbo-Croatian vrag (inherited)

→ Slovak vrah (inherited)

→ Ukrainian ворог (inherited)

→ Old Polish wróg (inherited)

→ Old Polish wróg (inherited)