Eche
Origin 1
From Middle English eche, ece, from Old English Ä“Ä‹e, ǣċe ("perpetual, eternal, everlasting"), from Proto-Germanic *aiwikjaz, *aiwÅkijaz ("eternal"), from Proto-Indo-European *hâ‚‚eyu- ("lifetime"). Cognate with Dutch eeuwig ("eternal"), German ewig ("eternal"), Swedish evig ("perpetual, eternal").
Origin 2
From Middle English echen ("to increase, augment"). More at eke.