English to English

adverb (r)

• in an intelligible manner(adv.all)

  Example:
  The foreigner spoke to us quite intelligibly.
  

  Synonym:
  clearly, understandably
  Antonym:
  unintelligibly, ununderstandably
  

  source: wordnet30
• In an intelligible manner; so as to be understood; clearly; plainly; as, to write or speak intelligibly.(adverb)

  source: webster1913