restrainer

[ri-strey-ner]

noun

1. a person or thing that restrains.

2. Photography.,  a chemical added to a developer to retard its action.

Word History and Origins

Origin of restrainer¹

First recorded in 1560–70; restrain + -er ¹

Example Sentences

“I don’t believe that the secretary is a card-carrying realist and restrainer,” said Mr. Ruger, whom Mr. Trump nominated in September to be his ambassador to Afghanistan.

Read more on New York Times

When they emerge from the restrainer they are killed, instantly, as a bolt powered by compressed air shoots through the brain.

Read more on Economist

In an experiment, researchers trapped one rat inside an uncomfortable, coffinlike restrainer with a door that could only be opened by a free-roaming rat.

Read more on Washington Post

In an experiment, researchers trapped one rat inside an uncomfortable, coffin-like restrainer with a door that could only be opened by a free-roaming rat.

Read more on Washington Post

After several sessions, the rats learned intentionally and quickly to open the restrainer and release the caged rats.

Read more on The Guardian

Related Words

• barrier 
• ledge 
• rein 
• restraint 
• restriction