adverb (r)

• in an offensive and hateful manner(adv.all)

  Example:
  I don't know anyone who could have behaved so abominably.
  

  Synonym:
  detestably, odiously, repulsively
  

  source: wordnet30
• in a terrible manner(adv.all)

  Synonym:
  abysmally, atrociously, awfully, rottenly, terribly
  

  source: wordnet30
• In an abominable manner; very odiously; detestably.(adverb)

  source: webster1913