The philologist Johann Christoph Adelung (1732–1806) states that the word has an origin in the Germanic vernacular, where was a New High German synonym for being flatulent, and was a form of the name Nicholas, commonly associated with a goblin or devil (e.g. "Old Nick", a familiar name for Satan), or more generally for a malevolent spirit or demon. Hence, "pumpernickel" means "farting devil" or "devil's fart", a definition accepted by the publisher Random House, and by some English language dictionaries, including the Merriam-Webster Dictionary. The American Heritage Dictionary adds "so named from being hard to digest". A variant of this explanation is also given by the German etymological dictionary "Kluge" that says the word is older than its usage for this particular type of bread, and may have been used as a mocking name for a person of unrefined manners (a "farting Nick") first. The change of meaning may have been caused by its use as a mocking expression for the (in the eyes of outsiders) "unrefined" rye bread produced by the Westphalian population.