Proto-Slavic *ezero

→ Bulgarian езеро (inherited)

→ Czech jezero (inherited)

→ Old Church Slavonic ѥзеро (inherited)

→ Old Church Slavonic ѥзеръ (inherited)

→ Lower Sorbian jazor (inherited)

→ Lower Sorbian jazoro (inherited)

→ Upper Sorbian jězor (inherited)

→ Latvian ezers (cognate)

→ Macedonian езеро (inherited)

→ Polish jezioro (inherited)

→ Romanian iezer (borrowed)

→ Serbo-Croatian jezero (inherited)

→ Serbo-Croatian језеро (inherited)

→ Slovak jazero (inherited)

→ Slovene jezero (inherited)

→ Yiddish אָזערע (derived)