Which word means 'to make impure'?

• A. Exudate
• B. Contaminate
• C. Contusion
• D. Capillary Action

Answer: (B)

Making something impure means introducing dirt or foreign substances into it. The word that fits this sense is contaminate, a verb that means to make something dirty or unsafe by adding impurities. In healthcare and everyday language, contamination refers to the presence of unwanted substances that compromise cleanliness or purity.

Exudate is a fluid discharged from tissues, often from inflammation. Contusion is a bruise, a collection of blood under the skin from injury. Capillary action describes the movement of liquid through narrow spaces due to adhesion and cohesion. None of these convey the act of making something impure.