To do something under ~ means to do it because someone forces you to do it or threatens you. (FORMAL)
He thought her confession had been made under ~.
N-UNCOUNT: usu under N
To do something under ~ means to do it because someone forces you to do it or threatens you. (FORMAL)
He thought her confession had been made under ~.
N-UNCOUNT: usu under N
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012