straightjacket
noun /ˈstreɪtdʒækɪt/
  /ˈstreɪtdʒækɪt/
(also straitjacket)
 - a piece of clothing like a jacket with long arms which are tied to prevent the person wearing it from behaving violently. Straightjackets are sometimes used to control people who are mentally ill.约束衣,紧身衣(有时用以束缚精神病患者) 
- (disapproving) a thing that stops something from growing or developing束缚;桎梏;约束