Greek prefixes

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Across
  1. 2. out
  2. 3. together, with
  3. 5. through, across
  4. 6. from, off
  5. 7. locative (in)
  6. 8. beside
  7. 11. below
  8. 13. upon, in addition
  9. 14. good
  10. 15. up, throughout
Down
  1. 1. bad, difficult
  2. 2. within
  3. 4. down
  4. 6. negative (not)
  5. 7. outside, external
  6. 9. against
  7. 10. over
  8. 12. after, change