To cloy is to be too much of something pleasant.(verb)
An example of cloy is for a fruit pie to be far too sweet to finish even a slice.
See cloy in Webster's New World College Dictionary
transitive verb, intransitive verb
Origin: aphetic < ME acloien, to hamper, harm, obstruct < OFr encloyer, to fasten with a nail, hinder < clou, a nail < L clavus, nail: see close
See cloy in American Heritage Dictionary 4
verb cloyed, cloy·ing, cloys verb, transitive
Origin: Short for obsolete accloy, to clog
Origin: , from Middle English acloien
Origin: , from Old French encloer, to drive a nail into
Origin: , from Medieval Latin inclāvāre
Origin: : Latin in-, in; see in-2
Origin: + Latin clāvāre, to nail (from clāvus, nail).
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