Proto-Slavic *sǫsědъ

→ Belarusian сусед (inherited)

→ Bulgarian съсед (inherited)

→ Czech soused (inherited)

→ Old Church Slavonic сѫсѣдъ (inherited)

→ Hungarian szomszéd (derived)

→ Macedonian сосед (inherited)

→ Polish sąsiad (inherited)

→ Russian сосед (inherited)

→ Serbo-Croatian susjed (inherited)

→ Serbo-Croatian сусјед (inherited)

→ Slovene sosed (inherited)

→ Silesian sōmsiŏd (inherited)

→ Ukrainian сусід (inherited)