You searched for: “adulterate”
adulterate (verb), adulterates; adulterated; adulterating
1. To corrupt, debase, or make impure by adding a foreign or inferior substance; often by replacing valuable ingredients with inferior ones; mixed with impurities: A restaurant was accused of adulterating their wine with water.
There are those who adulterate coffee with ground acorns or have silver debased or adulterated with copper.3. Etymology: "to corrupt" from Latin adulteratus, past participle of adulterare, "to falsify, to corrupt"; from alterare, "to change, to alter".
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