where does the word quack for doctor come from
Quackery Quackery or health fraud is the promotion[1] of fraudulent or ignorant medical practices. A quack is a "fraudulent or ignorant pretender to medical skill" or "a person who pretends, professionally or publicly, to have skill, knowledge, qualification or credentials he or she does not possess; a charlatan or snake oil salesman".[2] The term quack is a clipped form of the archaic term quacksalver, from Dutch: kwakzalver a "hawker of salve".[3] In the Middle Ages the term quack meant "shouting". The quacksalvers sold their wares on the market shouting in a loud voice.[4]