Old Church Slavonic небо

← Proto-Balto-Slavic *nebo (derived)

← Proto-Balto-Slavic *nebes- (mention)

← Proto-Indo-European *nébʰos (derived)

← Proto-Slavic *nȅbo (inherited)

→ Belarusian неба (borrowed)

→ Latin nebula (cognate)

→ Russian небо (borrowed)