taint的词根为taint
例句
1.
Today they close two schools to investigate concerns of tainted water.
今天，他们关闭了两所学校以调查水污染问题。
2.
That's when a chemical leak was found to have tainted the water supply.
当发现化学泄漏污染水源供应后救援行动就已经开始。
3.
Rachel: It tastes like it's tainted or something.
瑞秋：它尝起来像是被污染了，或者其它什么的。
