vocabulary crossword

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Across
  1. 4. interfere to cause damage
  2. 7. mental condition
  3. 9. become worse
  4. 10. well known
Down
  1. 1. inform
  2. 2. to make a process efficient
  3. 3. very little
  4. 5. move quickly
  5. 6. keenly interested
  6. 8. inexperienced