1.alarm,n.惊恐;惊慌;恐慌;警报;警报器;vt.使惊恐;使害怕;使担心;给(门等)安装警报器。
2.例句 :I felt a growing sense of alarm when he did not return that night.那天夜里他没有回家,我越来越感到恐慌。