pretty in WordNet English dictionary

1. to a moderately sufficient extent or degree
   "pretty big"; "pretty bad"; "jolly decent of him"; "the shoes are priced reasonably"; "he is fairly clever with computers"
   reasonably  moderately  pretty  jolly  somewhat  fairly  middling  passably  reasonably  moderately  pretty  jolly  somewhat  fairly  middling  passably 
   

1. (used ironically) unexpectedly bad
   "a pretty mess"; "a pretty kettle of fish"
   pretty 
   
2. pleasing by delicacy or grace; not imposing
   "pretty girl"; "pretty song"; "pretty room"
   pretty