Silent letters crossword

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Across
  1. 4. Fish that swims, but the 'l' sleeps.
  2. 5. Medieval warrior — the 'k' stays in the shadows.
  3. 6. Sharp tool, but don’t say the first letter aloud.
  4. 7. Not from here — the 'g' is silent.
  5. 8. You blow it, but the 't' doesn’t make a sound.
  6. 9. What you give, but the 'w' stays hidden.
  7. 10. Study of the mind — the first letter is shy.
  8. 12. A digit that keeps silent at the end.
Down
  1. 1. Body part — the 'c' is undercover.
  2. 2. Medieval home with a quiet 't'.
  3. 3. Joint that’s hard to bend without saying the first letter.
  4. 6. You might ____ the answer, but don’t pronounce the first letter.
  5. 8. Not right — the first letter hides.
  6. 11. Go up a hill silently ignoring the 'b'.
  7. 13. Time flies, but its 'h' is invisible.