Words with Silent Letters

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Across
  1. 3. Keep on biting on something so that it wears away
  2. 6. A round handle of a door or a small round piece of something
  3. 8. Short thick finger set apart from the other four
  4. 9. A kind of dwarf in in fairy tales, usually living underground
  5. 12. Twisted and knobbly like an old tree
  6. 13. Incorrect, not true
  7. 14. Hit a thing hard so as to make a noise
  8. 16. Piece of paper or something put on as a covering
  9. 18. Without the ability to speak, silent, stupid
  10. 20. The joint in the middle of the leg
  11. 21. Grind your teeth together
  12. 22. Used for saying what someone ought to do
  13. 24. Young cow or the fleshy back pary of the lower leg
Down
  1. 1. The round yellow part inside an egg
  2. 2. A tiny fly that bites
  3. 4. Put letters and words on paper or another surface
  4. 5. A feeling of not being sure of something
  5. 7. Cutting instrument with a sharp blade
  6. 10. A joint in the finger
  7. 11. A reply or a solution to a problem
  8. 15. A soft white or coloured stick used for writing on blackboards or drawing
  9. 16. To take part in a fight in which opponents try to throw each other
  10. 17. Exactly upright, vertical
  11. 19. An explosive device
  12. 23. One of two equal parts