pestilence         
noun uk/ˈpes.tɪ.ləns/ us/ˈpes.təl.əns/
 [ C or U ] formal瘟疫,疫病 
any very serious infectious disease that spreads quickly and kills large numbers of people
  [ S ]毒瘤,日益严重的问题 
a serious and growing problem
  The report states that vandalism is a pestilence that must be stamped out. 该报告说明,恶意破坏行为是一种毒瘤,必须铲除。