N-UNCOUNT [usu underN](因涉嫌参与违法活动而遭到的)(本宅)软禁 If someone is under house arrest, they are officially ordered not to leave their home, because they are suspected of being involved in an illegal activity. (因涉嫌参与违法活动而遭到的)(本宅)软禁
The main opposition leaders had been arrested or placed under house arrest.