Lithuanian dugnas

← Old Church Slavonic дъно (cognate)

← English deep (cognate)

← Proto-Balto-Slavic *dúbna (inherited)

← Proto-Indo-European *dʰewbʰ- (root)

← Proto-Indo-European *dʰubʰnós (inherited)

← Old Prussian dubnas (cognate)

→ Lithuanian bedugnis (confix)