awful in WordNet English dictionary

1. exceptionally bad or displeasing
   "atrocious taste"; "abominable workmanship"; "an awful voice"; "dreadful manners"; "a painful performance"; "terrible handwriting"; "an unspeakable odor came sweeping into the room"
   atrocious  abominable  awful  dreadful  painful  terrible  unspeakable 
   
2. inspiring awe or admiration or wonder
   "New York is an amazing city"; "the Grand Canyon is an awe-inspiring sight"; "the awesome complexity of the universe"; "this sea, whose gently awful stirrings seem to speak of some hidden soul beneath"- Melville; "Westminster Hall's awing majesty, so vast, so high, so silent"
   amazing  awe-inspiring  awesome  awful  awing 
   
3. inspired by a feeling of fearful wonderment or reverence
   "awed by the silence"; "awful worshippers with bowed heads"
   awed  awful 
   
4. offensive or even (of persons) malicious
   "in a nasty mood"; "a nasty accident"; "a nasty shock"; "a nasty smell"; "a nasty trick to pull"; "Will he say nasty things at my funeral?"- Ezra Pound
   nasty  awful 
   
5. causing fear or dread or terror
   "the awful war"; "an awful risk"; "dire news"; "a career or vengeance so direful that London was shocked"; "the dread presence of the headmaster"; "polio is no longer the dreaded disease it once was"; "a dreadful storm"; "a fearful howling"; "horrendous explosions shook the city"; "a terrible curse"
   awful  dire  direful  dread  dreaded  dreadful  fearful  fearsome  frightening  horrendous  horrific  terrible 
   
6. extreme in degree or extent or amount or impact
   "in a frightful hurry"; "spent a frightful amount of money"
   frightful  terrible  awful  tremendous 
   

1. used as intensifiers
   "terribly interesting"; "I'm awful sorry"
   terribly  awfully  awful  frightfully  terribly  awfully  awful  frightfully