library

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Across
  1. 2. a person in charge of or assisting in a library
  2. 4. the body of words used in a particular language or in a particular activity
  3. 6. need to be done or present; essential
  4. 7. a book that lists the words of a language and gives their meaning, or their equivalent in a different language
Down
  1. 1. earliest in time or order
  2. 3. the second month of the year
  3. 5. a building or room containing a collection of books and periodicals for use by the public or the members of an institution