An Etymological Dictionary of the German Language/Einfalt

by Friedrich Kluge

Einfalt, f., ‘simplicity, silliness,’ from MidHG. einvalt, einvalte (-vęlte), f., OHG. einfaltî, f., ‘simplicity, silliness’; comp. Goth. ainfalþei, f., ‘silliness, good nature’ — an abstract noun from Goth. ainfalþs, ‘silly,’ OHG. and MidHG. einfalt, ‘silly,’ whence OHG. einfaltîg, MidHG. einveltec, adj., ‘silly.’ See falt. —