Silent letters

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Across
  1. 2. to estimate
  2. 3. the tying of a rope
  3. 5. utensil used to cut
  4. 11. rubble, broken remains
  5. 12. to be uncertain
  6. 13. joint in your legs
  7. 14. high respect or fairness
  8. 16. offensive
  9. 20. a device for chopping off heads
  10. 21. the ability to see
  11. 23. a promise
  12. 25. written proof or purchase
  13. 26. grave, sad
  14. 27. prickly plants
  15. 28. part of your hand
Down
  1. 1. something that has been destroyed
  2. 2. to show someone the way
  3. 4. the solution to a question
  4. 6. to judge someone as guilty
  5. 7. a vertical row or pillar
  6. 8. owing money
  7. 9. speech
  8. 10. a walkway between rows
  9. 14. sixty minutes
  10. 15. to give up or quit work
  11. 17. an expert in science
  12. 18. a play fight
  13. 19. to hear
  14. 22. someone who stays at another person's home
  15. 24. something that explodes
  16. 27. a burial chamber