Greek and Latin roots

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Across
  1. 1. marrige
  2. 6. power
  3. 8. color
  4. 9. alone
  5. 11. light
  6. 13. people
  7. 15. fire
  8. 16. feeling
  9. 18. sound
  10. 19. book
  11. 20. opposing
  12. 21. custom habitat
Down
  1. 2. human
  2. 3. earth
  3. 4. teach
  4. 5. universe
  5. 7. water
  6. 10. bottom
  7. 11. study of
  8. 12. roll
  9. 14. outside
  10. 17. distance
  11. 18. to carry
  12. 19. life
  13. 21. wide