alarum

1. Iago. And when she speaks, is it not an alarum to love?
   伊阿古她说话的时候，不就是爱情的警报吗？
2. Arous'd and angry, I'd thought to beat the alarum, and urge relentless war.
   我曾经被唤醒和激怒了，想敲起警报，号召无情的战争。

noun

1. an automatic signal (usually a sound) warning of danger

   Synonym:    alarmalertwarning signal