cruel

Adjective

• (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: 
  barbarous , brutal , fell , roughshod , savage , vicious