The story
- Proto-Germanic · inherited from*andabindaną
- Proto-West Germanic · inherited from*andabindan
- Old English · inherited fromunbindan
- Middle English · inherited fromunbinden
- English todayunbind
From Middle English unbinden, from Old English unbindan, onbindan (“to unbind; untie”), from Proto-West Germanic *andabindan, from Proto-Germanic *andabindaną, equivalent to un- + bind. Cognate with Dutch ontbinden, German entbinden, Gothic 𐌰𐌽𐌳𐌱𐌹𐌽𐌳𐌰𐌽 (andbindan).
Etymology from Wiktionary, CC BY-SA 4.0.