Old Church Slavonic рокъ

← Proto-Slavic *rokъ (inherited)

→ Czech rok (cognate)

→ Old Church Slavonic пророкъ (prefix)

→ Old Church Slavonic отрокъ (prefix)

→ Old Church Slavonic зарокъ (prefix)

→ Old Church Slavonic нарокъ (prefix)

→ Old Church Slavonic оброкъ (prefix)

→ Old Church Slavonic порокъ (prefix)

→ Old Church Slavonic прирокъ (prefix)

→ Old Church Slavonic оурокъ (prefix)

→ Romanian răgaz (cognate)