adverb (r)

• in a sincere and heartfelt manner(adv.all)

  Example:
  I would dearly love to know.
  

  Synonym:
  in a heartfelt way
  

  source: wordnet30
• at a great cost(adv.all)

  Example:
  He paid dearly for the food.
  

  Synonym:
  dear
  

  source: wordnet30
• with affection(adv.all)

  Example:
  She loved him dearly.
  

  Synonym:
  affectionately, dear
  

  source: wordnet30
• In a dear manner; with affection; heartily; earnestly; as, to love one dearly.(adverb)

  source: webster1913