Contaminate

If you don't wash your hand before working, you'll contaminate the samples.

I don't want to contaminate the clean glasses by taking them out of the dishwasher.

Cars with heat engines contaminate a lot.

David Paige says it is important not to contaminate Mars with a microbe that could spread.

In addition, meatpackers will be barred from using the small intestines, head and spinal tissue from older cows, born prior to a rigorous inspection program for mad cow disease implemented in 1997, and packers will no longer be allowed to use certain slaughtering techniques that might contaminate safe meat.

This water is contaminated. It isn't safe to drink.

Bombs and munitions meanwhile contain toxic substances that contaminate soil, water, and vegetation.

Shall we now Contaminate our figures with base bribes?

I would neither have simplicity imposed upon, nor virtue contaminated.

[Martin] Heidegger's repellent political beliefs do not contaminate his philosophical work.