painful 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. causing misery or pain or distress
   "it was a sore trial to him"; "the painful process of growing up"
   afflictive  painful  sore 
   
3. causing physical discomfort
   "bites of black flies are more than irritating; they can be very painful"
   irritating  painful 
   
4. causing physical or psychological pain
   "worked with painful slowness"
   painful