Word assignment

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Across
  1. 2. severe mental or physical pain
  2. 4. an ungrateful person
  3. 5. a system of parts working together in a machine; a piece of machinery.
  4. 7. showing a skillful use of underhand tactics to achieve goals
  5. 9. having a stiff or prickly texture
Down
  1. 1. a chronic or persistent disorder of the mental processes caused by brain disease or injury and marked by memory disorders, personality changes, and impaired reasoning
  2. 2. the process of scraping or wearing something away
  3. 3. a flat round cake of pastry or bread
  4. 6. a parrot with an erectile crest, found in Australia, eastern Indonesia, and neighboring islands
  5. 8. scold or criticize someone angrily