Pollute is a verb that means to make something dirty or impure. You can pollute a river by pouring waste into it, or you can pollute your body by eating way too much candy.
Pollute comes from the Latin word pollut-, meaning “soiled.” When you pollute something, it's soiled or contaminated, often by something poisonous. You might have heard the word pollution — pollution is the stuff that pollutes the environment. The word pollute can be used more figuratively to describe something that corrupts or degrades. For example, reading articles about celebrity weddings can pollute your mind.