Polish osa

← Proto-Indo-European *wobʰseh₂ (derived)

← Proto-Indo-European *webʰ- (mention)

← Proto-Slavic *osa (inherited)

→ English asp (cognate)

→ Latvian apse (cognate)

→ Latvian lapsene (cognate)

→ Polish osi (affix)

→ Polish osojad (affix)

→ Old Armenian ոփի (cognate)