ugly in WordNet English dictionary

1. 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"
   atrocious  frightful  horrifying  horrible  ugly 
   
2. morally reprehensible
   "would do something as despicable as murder"; "ugly crimes"; "the vile development of slavery appalled them"; "a slimy little liar"
   despicable  ugly  vile  slimy  unworthy  worthless  wretched 
   
3. inclined to anger or bad feelings with overtones of menace
   "a surly waiter"; "an ugly frame of mind"
   surly  ugly 
   
4. displeasing to the senses
   "an ugly face"; "ugly furniture"
   ugly