IPA: /səˈprɛsənt/
KK: /səˈprɛsənt/
A substance that reduces or controls something, often used in medicine to lessen symptoms or effects.
The doctor prescribed a suppressant to help manage her allergies.
Suppressant → It is formed from "suppress" (from Latin "suppressus", meaning to press down) and the suffix "-ant" (meaning an agent or something that performs an action). The word "suppressant" refers to something that acts to press down or inhibit a process or function.
Think of something that 'presses down' ('suppress') on a function or action, and the '-ant' indicates it is an agent that performs this action.
No commonly confused words.