v.
tr. To cause distaste or disgust by supplying with too much of something originally pleasant, especially something rich or sweet; surfeit. v.
intr. To be too filling, rich, or sweet.
[Short for obsolete accloy, to clog, from Middle English acloien, from Old French encloer, to drive a nail into, from Medieval Latin inclāvāre : Latin in-, in; see in-2 + Latin clāvāre, to nail (from clāvus, nail).] cloy'ing·ly adv., cloy'ing·ness n.
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.