The story
- Proto-Indo-European · inherited from*éti
- Proto-Germanic · inherited from*idi-
- Proto-West Germanic · inherited from*id-
- Old English · inherited fromed-“again, re-”
- Middle English · inherited fromed-
- English todayed-
From Middle English ed-, from Old English ed- (“again, re-”), from Proto-West Germanic *id-, from Proto-Germanic *idi-, *idi, *ida (“back, backwards, again”), from Proto-Indo-European *éti. Cognate with Dutch et-, German dialectal it- (“again, back”), Icelandic ið- (“again, back”), Gothic 𐌹𐌳- (id-, “again, back”), Welsh ad-, Welsh ed- (“again, back”), Latin et (“and”), Latin at (“but, moreover”).
Etymology from Wiktionary, CC BY-SA 4.0.