calumniate       
verb [ I or T ]  formal uk/kəˈlʌm.ni.eɪt/ us/kəˈlʌm.ni.eɪt/
 毁谤;恶意中伤;污蔑
to make statements about someone that are not true and that are damaging to their reputation
  He has tried to calumniate and destroy everyone whose opinions differ from his. 他会去恶意中伤和摧毁所有与他意见不同的人。 
 - More examples
 - He claimed that we had grossly calumniated the medical profession.
 - Is this the liberty of the press, to calumniate an individual in the way my client has been calumniated?
 - Do you think he is capable of lying or calumniating in court?
 - He spoke of being persecuted and calumniated by a small group of rich and powerful people.