Three Skeleton Key

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Across
  1. 2. bone
  2. 3. twisting movements
  3. 4. sullen
  4. 7. unvarying
  5. 8. farming tool
  6. 9. disinfect
  7. 10. related to the sea
Down
  1. 1. exclude others
  2. 5. preliminary surveying
  3. 6. enough