Question

Based on the prefix, de-, what does the word “decongestant” mean?

a device that causes congestion
a resource that defines congestion
a way to measure congestion
a substance that reduces congestion

Answer 1

D. A substance that reduces congestion

Answer 2

Answer: A substance that reduces congestion

Explanation: The prefix de means to do the opposite of something. Think of the word deactivate :)