alarum /-ˈlɑrmɪŋli/
  驚慌;警報;召集;鬧鈴
  A·lar·um n.  See Alarm. [Now Poetic]
  Note: ☞ The variant form alarum is now commonly restricted to an alarm signal or the mechanism to sound an alarm (as in an alarm clock.)
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  alarum
       n : an automatic signal (usually a sound) warning of danger
           [syn: alarm, alert, warning signal]