Proto-Slavic *bornь

→ Bulgarian бран (inherited)

→ Old Church Slavonic оборона (inherited(cu/ru))

→ Old Church Slavonic оборона (inherited(cu/uk))

→ Old Church Slavonic брань (inherited)

→ Lower Sorbian broń (inherited)

→ Romanian braniște (derived)

→ Russian брань (derived)

→ Russian боронь (inherited)

→ Slovene bran (inherited)