IPA: /rɪˈstreɪnər/
KK: /rɪˈstreɪnər/
A person or thing that prevents or limits something from happening or being expressed.
The restrainer was used to keep the animals calm during the transport.
Restrainer → It is formed from "re-" (meaning back or again) and "stringere" (meaning to bind or tie). The word "restrainer" refers to someone or something that binds or holds back.
Think of someone who 'binds back' ('re-' means back and 'stringere' means to bind) — that's why a restrainer is someone who holds something back.