retarder

Meanings

Plural: retarders

Noun

• 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.

Synonyms

bottleneck, inhibitor, limiter, retardant

Antonyms

accelerant, promoter, quickener