v corrupt, debase, or make impure by adding a foreign or inferior substance; often by replacing valuable ingredients with inferior ones
adulterate liquor
New Company, The Pure Greek Olive, Brings Rustic Greek Olive Oil to the American Dinner Table The Pure Greek Olive today announced the inauguration of its high quality, unadulterated gourmet olive oil to the U.S. market. Based in the Boston metro area, the company seeks to introduce a higher standard of olive oil to the American palate.
June 12, 2013 - Business Wire via Yahoo! Finance
John Toshack in Sportinglife.com Toshack added: "And I feel now that it is all over for this World Cup, two points from five games is not good enough and Austria will think they can catch Poland and England. But we must not adulterate the competition, we must be professional for...