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adverb (r)

• to a severe or serious degree(adv.all)

  Example:
  A severely impaired heart.
  

  Synonym:
  badly, gravely, seriously
  

  source: wordnet30
• with sternness; in a severe manner(adv.all)

  Example:
  Peered severely over her glasses.
  

  Synonym:
  sternly
  

  source: wordnet30
• causing great damage or hardship(adv.all)

  Example:
  She was severely affected by the bank's failure.
  

  Synonym:
  hard
  

  source: wordnet30