VERB
在（饮食中）掺入杂质;掺假
If something such as food or drink is adulterated, someone has made its quality worse by adding water or cheaper products to it.
例句
The food had been adulterated to increase its weight...
食物被掺了杂质以增加分量。
There is a regulation against adulterated cosmetics.
规定禁止出售假冒化妆品。