incredibly

Adverb

• exceedingly; extremely
  • she plays fabulously well
    

• not easy to believe
  • behind you the coastal hills plunge to the incredibly blue sea backed by the Turkish mountains
    

Related words

• Synonyms: 
  fabulously , fantastically , improbably , implausibly , unbelievably
• Antonyms: 
  believably , credibly , plausibly , probably