Proto-Slavic *žьrny

→ Bulgarian жерка (derived)

→ Czech žernov (derived)

→ Old Church Slavonic жрьнꙑ (inherited)

→ Polish żarna (inherited)

→ Russian жёрнов (inherited)

→ Serbo-Croatian žrvanj (inherited)

→ Serbo-Croatian жрвањ (inherited)