"Can one desire too much of a good thing?" asks Rosalind in William Shakespeare's play As You Like It. Cloying suggests that you can because it implies a repugnant excess of something that might be pleasing in smaller doses. An exploration into the history of cloying, however, leads us eventually to roots that are neither sweet nor excessive, but rather tough as nails. Cloying derives from the verb cloy, which now means "to supply or indulge to excess," but which once meant "to clog" and earlier "to prick a horse with a nail in shoeing." Cloy itself traces via Middle English to Anglo-French encloer (which also meant "to prick a horse with a nail in shoeing") and ultimately to Latin clavus, meaning "nail."