silent letters

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Across
  1. 4. someone intelligent and well informed
  2. 6. a part of the finger at a joint where the bone is near the surface
  3. 7. to take part in a fight
  4. 8. making twisted, swirly motions of the body
  5. 12. bag made out of waterproof material
  6. 13. lumps on objects
Down
  1. 1. to mark on a surface
  2. 2. facts, information, and skills someone has learned
  3. 3. small worthless objects
  4. 5. statue in your garden
  5. 7. in a very unhappy of Fortinet of poor quality
  6. 8. a slight line or fold in something
  7. 9. the activity of composing text
  8. 10. an argument which is long and complicated
  9. 11. knobbly, rough, and twisted