charlatan
Pronunciation: /ˈSHärlətən, ˈSHärlətn
noun
A person falsely claiming to have a special knowledge or skill; a fraud.
Origin
early 17th century (denoting an itinerant seller of supposed remedies): from French, from Italian ciarlatano, from ciarlare 'to babble'.
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He was a charlatan, no doubt. His remedies were just some cheap wine mixed with a little gelatin to make them thicker. The only thing that was "cured" was the lump at his client's hips, the wallets from which he extracted wads of money.