Read the sentence. when i told the doctor of my sinus pain and nasal pressure, she offered me a decongestant. 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

a substance that reduces congestion.

A "decongestant" is a substance that reduces congestion. The prefix de- often symbolizes the taking out, or removal of something. This is the case in words such as dehumanize (to make less human), dehumidify (to make less humid), declaw (to remove the claws of an animal) and declutter (to remove clutter).

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