flagitious

Adjective

• shockingly brutal or cruel
  • murder is an atrocious crime
    
  • a grievous offense against morality
    
  • a grievous crime
    
  • no excess was too monstrous for them to commit
    

• extremely wicked, deeply criminal
  • a flagitious crime
    
  • heinous accusations
    

Related words

• Synonyms: 
  atrocious , grievous , monstrous , heinous