trep·i·da·tion /ˌtrɛpəˈdeʃən/
  恐懼,驚惶,憂慮
  Trep·i·da·tion n.
  1. An involuntary trembling, sometimes an effect of paralysis, but usually caused by terror or fear; quaking; quivering.
  2. Hence, a state of terror or alarm; fear; confusion; fright; as, the men were in great trepidation.
  3. Anc. Astron. A libration of the starry sphere in the Ptolemaic system; a motion ascribed to the firmament, to account for certain small changes in the position of the ecliptic and of the stars.
  Syn: -- Tremor; agitation; disturbance; fear.
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  trepidation
       n : a feeling of alarm or dread