adverb (r)

• extremely(adv.all)

  Example:
  It will be an extraordinarily painful step to negotiate.
  

  Synonym:
  all-fired, bloody, boiling, damn, drop-dead, enormously, goddam, goddamn, goddamned, hellishly, hugely, infernally, inordinately, positively, precious, preciously, roaring, sh
  

  source: wordnet30
• In an extraordinary manner or degree.(adverb)

  source: webster1913