adulterate

The company was fined for trying to adulterate the honey with cheap corn syrup.

(Chinese) 该公司因试图用廉价的玉米糖浆在蜂蜜中掺假而被罚款。

Illegal traders sometimes adulterate expensive spices with sawdust or sand.

(Chinese) 非法商贩有时会用锯末或沙子在昂贵的香料中掺假。