adulteration
noun
[ ədʌlt(ə)ˈreɪʃ(ə)n ]
• the action of making something poorer in quality by the addition of another substance.
• "we're working on a new diagnostic test to more rapidly monitor food adulteration"
Origin:
early 16th century: from Latin adulterat- ‘corrupted’, from the verb adulterare + -ion.
