restrainer
/rɪˈstreɪnər/
noun
- A person or thing that holds back, controls, or limits someone or something.
- The safety harness is a vital restrainer for workers on high scaffolding.
- In the debate, the moderator served as a restrainer, ensuring everyone spoke in turn.
- The dog's leash acted as a restrainer, keeping it from running into the street.
Synonyms