Old Church Slavonic длъгъ

← Gothic 𐌳𐌿𐌻𐌲𐍃 (cognate)

← Proto-Indo-European *dʰelgʰ- (root)

← Proto-Slavic *dъlgъ (inherited)

→ Old Church Slavonic длъжьникъ (suffix)

→ Old Church Slavonic длъготрьпѣниѥ (affix)

→ Welsh dylu (cognate)

→ Romanian Dâlga (mention)

→ Old Irish dligid (cognate)