Этимология
() From Middle English onfold (“single, simple, honest, onefold”), from from Old English ānfeald (“single, simple”, literally “onefold”), from Proto-Germanic *ainafaldaz (“onefold, simple”), equivalent to one + -fold. Cognate with Dutch eenvoud (“simple, easy”), German Einfalt (“simplicity”), Icelandic einfaldur (“simple”), Gothic