Proto-Slavic *syrъ

→ Belarusian сыр (inherited)

→ Belarusian сыры (derived)

→ Bulgarian сур (derived)

→ Czech sýr (inherited)

→ Kashubian sur (derived)

→ Kashubian sër (inherited)

→ Kashubian sëri (inherited)

→ Kashubian sëra (derived)

→ Old Church Slavonic сꙑръ (derived)

→ Lower Sorbian sera (inherited)

→ Lower Sorbian syry (inherited)

→ Macedonian сирење (inherited)

→ Polish ser (derived)

→ Russian сыр (inherited)

→ Russian сырой (derived)

→ Serbo-Croatian sir (inherited)

→ Serbo-Croatian сир (inherited)

→ Serbo-Croatian сиров (inherited)

→ Slovak syr (inherited)

→ Slovene sir (inherited)

→ Silesian syr (inherited)

→ Ukrainian сир (inherited)

→ Ukrainian сирий (inherited)