IPA: //ˌdiː.kənˈdʒɛs.tənt//
KK: /diˈkɒndʒəstənt/
Able to help reduce or relieve blockage in the nasal passages or other areas of the body.
The doctor recommended a decongestant to help with my stuffy nose.
A type of medicine that helps to reduce swelling in the nasal passages, making it easier to breathe when you have a stuffy nose.
I took a decongestant to help clear my sinuses before the big meeting.
Decongestant → It is formed from "de-" (meaning down or away) and "congest" (from Latin "congestus", meaning to bring together or pile up) and the suffix "-ant" (indicating an agent or something that performs an action). The word "decongestant" refers to a substance that works to relieve congestion by reducing the accumulation of fluids or mucus.
Think of 'de-' meaning to reduce or remove and 'congest' meaning to pile up. A decongestant is something that helps to clear away the buildup.