The Professor and the Madman

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Across
  1. 4. The origin of a word and the historical development of its meaning
  2. 6. An institute offering shelter and support to the mentally ill
  3. 8. An extremely foolish or eccentric person
  4. 9. A resource that lists the words of a language and gives their meaning often also providing information about pronunciation, origin, and usage
  5. 10. A long-term mental disorder involving a breakdown in the relation between thought, emotion, and behavior, leading to faulty perception,withdrawal from reality, fantasy, and delusion
Down
  1. 1. The scientific study of the human mind and its functions, especially those affecting behavior in a given context
  2. 2. The unlawful premeditated killing of one human being by another
  3. 3. The body of words used in a language
  4. 5. The practice of compiling dictionaries
  5. 7. an idiosyncratic belief or impression that is firmly maintained despite being contradicted by what is generally accepted as reality or rational argument, typically a symptom of mental disorder