to keep a violent person in a way that prevents them from moving freely

The two prisoners were kept under restraint while they were transported between prisons. 在转监途中，两名犯人受到了人身限制。

He'd lashed out at the police officer and been placed under restraint.

In such a situation, an individual can lawfully be placed under restraint.

Prisoners were routinely kept under restraint until the courts declared it illegal without cause.

She'd threatened violence and been placed under restraint.