Hydroquinone was a word barely used in 1843.
=== Skin depigmentation ===Hydroquinone is used as a topical application in skin whitening to reduce the color of skin
 John Locke wrote that the use of words "is to be sensible marks of ideas", though they are chosen "not by any natural connexion that there is between particular articulate sounds and certain ideas, for then there would be but one language amongst all men; but by a voluntary imposition, whereby such a word is made arbitrarily the mark of such an idea"

