Proto-Slavic *četyre

→ Belarusian чатыры (inherited)

→ Bulgarian четири (inherited)

→ Czech čtyři (inherited)

→ Kashubian szterë (inherited)

→ Kashubian sztërë (inherited)

→ Old Church Slavonic четꙑре (inherited)

→ Lower Sorbian styri (inherited)

→ Upper Sorbian štyri (inherited)

→ Macedonian четири (inherited)

→ Polish cztery (inherited)

→ Polabian citĕr (inherited)

→ Russian четыре (inherited)

→ Rusyn штири (inherited)

→ Rusyn чотыри (inherited)

→ Serbo-Croatian четири (inherited)

→ Serbo-Croatian četiri (inherited)

→ Slovak štyri (inherited)

→ Slovene štiri (inherited)

→ Slovene štirje (inherited)

→ Silesian sztyry (inherited)

→ Ukrainian чотири (inherited)

→ Slovincian štė̂řä (inherited)