suicide  
noun uk/ˈsuː.ɪ.saɪd/ us/ˈsuː.ə.saɪd/
  (DEATH)      
 B2 [ C or U ]自杀;自杀者 
the act of killing yourself intentionally, or a person who has done this
  to attempt/commit suicide 企图自杀/自杀 
 The suicide rate among men between the ages of 16 and 25 has risen alarmingly. 16至25岁之间男性的自杀率攀升速度令人担忧。 
 Many suicides occur in prisons. 监狱中的自杀事件很多。 
 Compare: manslaughtermurder noun
 - More examples
 - All the evidence points to suicide.
 - The family were shattered at the news of Annabel's suicide.
 - She tried to commit suicide by slashing her wrists.
 - The prime suspect in the case committed suicide.
 - When the scandal broke , the company director committed suicide.
 
  (DEFEAT)      
 [ U ]自杀性行为;自取灭亡的行为 
any act that has the effect of causing your own defeat
  [ + to infinitive ] As a leader he knows that it is political suicide to appear indecisive. 他知道作为一位领袖表现得犹疑不定无疑是在政治上自取灭亡。