retarder

Plural: retarders

Noun

• One that retards; a substance that slows a process.
• Something which retards or slows.
• A device for slowing down large trucks, lorries, buses, shunted railway wagons.
• A refrigerator used to slow down proofing of yeast when making dough.

Examples

• His slow, deliberate pace was a natural RETARDER to his opponent’s rapid-fire word placement.
• The substance acted as a retarder to the chemical reaction because it radically changed the pH.

Synonyms

bottleneck, inhibitor, limiter, retardant

Antonyms

accelerant, promoter, quickener