Proto-Slavic *pьsъ

→ Belarusian пёс (inherited)

→ Bulgarian пес (inherited)

→ Czech pes (inherited)

→ Old Church Slavonic пьсъ (inherited)

→ Lower Sorbian pjas (inherited)

→ Upper Sorbian pos (inherited)

→ Macedonian пес (inherited)

→ Old East Slavic пьсъ (inherited)

→ Polish pies (inherited)

→ Polabian ṕås (inherited)

→ Russian пёс (inherited)

→ Rusyn пес (inherited)

→ Serbo-Croatian pes (inherited)

→ Serbo-Croatian pas (inherited)

→ Serbo-Croatian пас (inherited)

→ Serbo-Croatian psovati (mention)

→ Slovak pes (inherited)

→ Slovene pes (inherited)

→ Ukrainian пес (inherited)

→ Old Czech pes (inherited)