exorcism          
noun [ C or U ] uk/ˈek.sɔː.sɪ.zəm/ us/ˈek.sɔːr.sɪ.zəm/
 (通过祈祷或法术)驱魔,祛邪
the process of forcing an evil spirit to leave a person or place by using prayers or magic
  A hundred million people believe in the magic power of signs and exorcism.  有一亿人相信符号和祛邪咒语是有魔力的。 
 The bishop was recalled to Rome after endorsing faith-healing and exorcism. 主教对信仰治疗和祛除邪魔这些做法表示认可后,被招回了罗马。 
  祛除邪魔,治愈恐惧阴影
the act of removing the bad effects of a frightening or upsetting event
  Writing poetry becomes both a desirable madness and an exorcism of society's madness.  写诗既是一种令人向往的疯狂,也是祛除社会疯狂的手段。 
 It was far more than a play; it was an exorcism of the tragedy of war. 这远不仅是一场戏剧。 它还兼有治愈战争悲剧阴影的作用。 
 See: exorcise
 - More examples
 - He occasionally lays hands on people to rid them of demons, but he objects to terming it exorcism.
 - One of the stories relates what it feels like to experience an exorcism.
 - There is no rite of exorcism for the spirits of fallen comrades that haunt his thoughts.