The story
- Proto-Germanic · inherited from*ainafalþaz“onefold, simple”
- Proto-West Germanic · inherited from*ainfald
- Old English · inherited fromānfeald“single, simple”
- Middle English · inherited fromonfold
- English todayonefold
From Middle English onfold, anfald (“single, simple, honest, onefold”), from Old English ānfeald (“single, simple”, literally “onefold”), from Proto-West Germanic *ainfald, from Proto-Germanic *ainafalþaz (“onefold, simple”), equivalent to one + -fold. Cognate with Dutch eenvoud (“simplicity, easiness”), German Einfalt (“simplicity”) and einfach (“simple”), Icelandic einfaldur (“simple”), Gothic 𐌰𐌹𐌽𐍆𐌰𐌻𐌸𐍃 (ainfalþs, “simple”). More at one, -fold.
Etymology from Wiktionary, CC BY-SA 4.0.