vicious

Adjective

• marked by deep ill will; deliberately harmful
  • poisonous hate
    
  • venomous criticism
    
  • vicious gossip
    

• bringing or deserving severe rebuke or censure
  • a criminal waste of talent
    
  • a deplorable act of violence
    
  • adultery is as reprehensible for a husband as for a wife
    

• having the nature of vice

• (of persons or their actions) able or disposed to inflict pain or suffering
  • a barbarous crime
    
  • brutal beatings
    
  • cruel tortures
    
  • Stalin's roughshod treatment of the kulaks
    
  • a savage slap
    
  • vicious kicks
    

Related words

• Synonyms: 
  poisonous , venomous , condemnable , criminal , deplorable , reprehensible , evil , barbarous , brutal , cruel , fell , roughshod , savage