bar·bar·i·ty
 /bɑɚˈberəti/  noun  ,  pl   -ties
  1 [  noncount  ] : extreme cruelty : a very cruel and violent quality
   The barbarity of the attack was horrifying.
   The photos vividly capture the war's barbarity.
  2 [  count  ] : a cruel act
   He is accused of inflicting unimaginable barbarities on his own people.