ob·ses·sion /ɑbˈsɛʃən, əb-/
  迷住,困擾
  ob·ses·sion /ɑbˈsɛʃən, əb-/ 名詞
  強迫觀念,強迫症
  Ob·ses·sion n.
  1. The act of besieging.  [archaic]
  2. The state of being besieged; -- used specifically of a person beset by a spirit from without.  [archaic]
     Whether by obsession or possession, I will not determine.   --Burton.
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  obsession
       n 1: an irrational motive for performing trivial or repetitive
            actions against your will [syn: compulsion]
       2: an unhealthy and compulsive preoccupation with something or
          someone [syn: fixation]