IPA: /ˈstreɪtˌdʒækɪt/
KK: /ˈstreɪtˌdʒækɪt/
A type of clothing made of strong material that is used to restrain a person's arms, often used in mental health facilities to prevent them from harming themselves or others.
The patient was placed in a straightjacket for their own safety during the crisis.
Straightjacket → It is formed from "straight" (from Old English *streht*, meaning not bent or curved) and "jacket" (from Old French *jaquette*, meaning a small coat). The word "straightjacket" refers to a coat designed to keep a person straight and restrained, typically used in mental health settings.
Think of something that keeps you 'not bent' ('straight') and 'coated' ('jacket') — that's why a straightjacket is a restraint that keeps someone straight.
No commonly confused words.