opposite adjectives

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Across
  1. 1. strong
  2. 2. expensive
  3. 3. ugly
  4. 7. close
  5. 8. low
  6. 9. dry
Down
  1. 1. narrow
  2. 2. dirty
  3. 4. empty
  4. 5. dark
  5. 6. hard
  6. 10. difficult