frightful

Adjective

• extremely distressing
  • fearful slum conditions
    
  • a frightful mistake
    

• extreme in degree or extent or amount or impact
  • in a frightful hurry
    
  • spent a frightful amount of money
    

• provoking horror
  • an atrocious automobile accident
    
  • a frightful crime of decapitation
    
  • an alarming, even horrifying, picture
    
  • war is beyond all words horrible- Winston Churchill
    
  • an ugly wound
    

Related words

• Synonyms: 
  fearful , terrible , awful , tremendous , atrocious , horrifying , horrible , ugly