Opposites!

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Across
  1. 2. difficult
  2. 6. open
  3. 7. bad
  4. 9. thin
  5. 11. wide
  6. 12. short
  7. 14. safe
  8. 16. dark
  9. 17. expensive
  10. 18. cold
  11. 19. slow
Down
  1. 1. wet
  2. 3. big
  3. 4. ugly
  4. 5. interesting
  5. 8. weak
  6. 10. new
  7. 13. straight
  8. 14. clean
  9. 15. left