adulterate

[v. uh-duhl-tuh-reyt; adj. uh-duhl-ter-it, -tuh-reyt] [v. əˈdʌltəˌreɪt; adj. əˈdʌltərɪt, -təˌreɪt]
verb
  • to make impure by adding extraneous, improper, or inferior ingredients
  • adjective
  • spurious, debased or impure
  • "All right! I've decided once and for all—we shall not adulterate our fine picnic with the likes of the Count!"