The term 'made impure' can be summarized as 'ADULTERATED' (11 letters). Adulteration is the process of making something impure by adding or mixing in other substances. It is commonly used to refer to food and drink, where it is done to increase the quantity of the product, or to make it more attractive or palatable. Adulteration can also refer to the addition of drugs or other substances to a product, which can have serious health implications.