1530, aphetic of Anglo-Norm. acloyer, from O.Fr. enclouer "to fasten with a nail, hinder, cripple a horse by driving a nail into the hoof," from clou "a nail," from V.L. inclavare, from L. clavus "a nail" (see slot
(2)). Meaning "to fill to loathing, surfeit" is first recorded 1530.