perish  
verb [ I ] uk/ˈper.ɪʃ/ us/ˈper.ɪʃ/
  (DIE)      
  (尤指因事故或遇害)丧生,死亡;消亡;毁灭
to die, especially in an accident or by being killed, or to be destroyed
  Three hundred people perished in the earthquake. 300人在此次地震中丧生。 
 He believes that Europe must create closer ties or it will perish. 他认为整个欧洲必须建立更紧密的联系,否则就会灭亡。 
   (DECAY)      
 UK(橡胶、皮革等)脆裂,老化 
If material such as rubber or leather perishes, it decays and starts to break into pieces.
  Sunlight has caused the rubber to perish. 橡胶因暴露于阳光下而老化。 
 Idiom   
perish the thoughtidiom  humorous or informal 死了这条心吧
said to show that you hope that something that has been suggested will never happen
  Me, get married? Perish the thought! 我,结婚?死了这条心吧!