silent letters

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Across
  1. 3. without feeling or sensation
  2. 4. long bladed weapon
  3. 6. make a high-pitched sound by blowing
  4. 9. land completely surrounded by water
  5. 13. powered by compressed air
  6. 14. tool with teeth for tidying hair
  7. 15. prickly wild plant with purple flowers
  8. 16. serious and formal
  9. 18. form letters and words
  10. 19. go up something using hands and feet
Down
  1. 1. bite repeatedly with teeth
  2. 2. rest on one or both knees
  3. 5. uncertainty or lack of belief
  4. 7. small line or fold in skin or fabric
  5. 8. hit a door to get attention
  6. 10. season after summer
  7. 11. money that is owed
  8. 12. armoured soldier in medieval times
  9. 14. large fortified stone building
  10. 17. young sheep