1. (

• atrocious ,
• frightful ,
• horrifying ,
• horrible ,
• ugly ,

) 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" ;

2. (

• frightful ,
• terrible ,
• awful ,
• tremendous ,

) extreme in degree or extent or amount or impact; "in a frightful hurry"; "spent a frightful amount of money" ;

3. (

• fearful ,
• frightful

) extremely distressing; "fearful slum conditions"; "a frightful mistake" ;