Proto-Slavic *vъšь

→ Belarusian вош (inherited)

→ Bulgarian въшка (inherited)

→ Czech veš (inherited)

→ Old Church Slavonic въшь (inherited)

→ Lower Sorbian weš (inherited)

→ Upper Sorbian woš (inherited)

→ Macedonian вошка (inherited)

→ Polish wesz (inherited)

→ Polabian vås (inherited)

→ Russian вошь (inherited)

→ Rusyn уша (inherited)

→ Serbo-Croatian ваш (inherited)

→ Serbo-Croatian uš (inherited)

→ Serbo-Croatian vaš (inherited)

→ Serbo-Croatian уш (inherited)

→ Slovak voš (inherited)

→ Slovene uš (inherited)

→ Ukrainian воша (inherited)