Silent letters

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Across
  1. 1. you can find them in gardens
  2. 4. something you can make out of string like a sweater
  3. 5. this connects two bones on the leg
  4. 7. nibbling something
  5. 8. cut some vegetables
Down
  1. 1. its like a fly, an insect
  2. 2. like old and twisted bumpy tree
  3. 3. grinding teeth
  4. 5. understand something
  5. 6. someone's at the door