English to English

adverb (r)

• in a willing manner(adv.all)

  Example:
  I willingly accept.
  

  Synonym:
  fain, gladly, lief, volitionally
  Antonym:
  unwillingly
  

  source: wordnet30
• In a willing manner; with free will; without reluctance; cheerfully.(adverb)

  source: webster1913