Past participle:

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Across
  1. 3. froze
  2. 6. forbid
  3. 8. give
  4. 12. fly
  5. 13. lay
  6. 15. hold
  7. 16. keep
  8. 17. know
Down
  1. 1. buy
  2. 2. lead
  3. 3. find
  4. 4. bring
  5. 5. grow
  6. 7. beat
  7. 9. fall
  8. 10. go
  9. 11. bite
  10. 12. feed
  11. 14. learn