Proto-Slavic *osь

→ Belarusian вось (inherited)

→ Bulgarian ос (inherited)

→ Czech osa (inherited)

→ Lower Sorbian wós (inherited)

→ Macedonian оска (inherited)

→ Polish oś (inherited)

→ Romanian osie (borrowed)

→ Russian ось (inherited)

→ Serbo-Croatian os (inherited)

→ Serbo-Croatian osa (inherited)

→ Serbo-Croatian оса (inherited)

→ Serbo-Croatian ос (inherited)

→ Slovak os (inherited)

→ Slovene os (inherited)

→ Ukrainian вісь (inherited)