Ancient Greek στέρνον

← Proto-West Germanic *stirniju (cognate)

← Proto-Indo-European *sterh₃- (root)

← Proto-Indo-European (derived)

← Proto-Indo-European *sterh₃- (derived)

→ Galician esterno (derived)

→ Ancient Greek δασύστερνος (affix)

→ Italian sterno (derived)

→ Latin sternum (borrowed)

→ Translingual Sternorrhyncha (derived)

→ Portuguese esterno (derived)