Proto-Slavic *rъďa

→ Belarusian іржавы (mention)

→ Belarusian іржа (inherited)

→ Bulgarian ръжда (inherited)

→ Czech rez (inherited)

→ Lower Sorbian rza (inherited)

→ Lower Sorbian zarz (mention)

→ Hungarian rozsda (derived)

→ Macedonian ’рѓа (inherited)

→ Macedonian ’рѓав (mention)

→ Polish rdza (inherited)

→ Russian ржа (inherited)

→ Russian ржавый (mention)

→ Serbo-Croatian рђа (inherited)

→ Serbo-Croatian rđa (inherited)

→ Slovak hrdza (inherited)

→ Ukrainian іржа (inherited)

→ Old Czech rzě (inherited)