Proto-Slavic *rokъ

→ Belarusian рок (inherited)

→ Czech rok (inherited)

→ Old Church Slavonic отрочѧ (mention)

→ Old Church Slavonic рокъ (inherited)

→ Macedonian рок (inherited)

→ Polish rok (inherited)

→ Romanian răgaz (cognate)

→ Russian рок (inherited)

→ Serbo-Croatian rok (inherited)

→ Serbo-Croatian rok (inherited(sh/sl))

→ Serbo-Croatian урок (mention)

→ Serbo-Croatian urok (mention)

→ Serbo-Croatian uzrok (mention)

→ Serbo-Croatian рок (inherited)

→ Serbo-Croatian узрок (mention)

→ Slovak rok (inherited)

→ Ukrainian рік (inherited)