Etymology Crossword

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Across
  1. 3. four letter word meaning one
  2. 4. prefix meaning one hundred
  3. 6. Prefix meaning five
  4. 9. two hundred years
  5. 11. a shape with four sides
  6. 12. a shape with five sides
  7. 13. prefix meaning three
  8. 14. prefix meaning one
  9. 15. One thousand
  10. 16. Prefix meaning four
  11. 17. Prefix meaning ten
Down
  1. 1. a unicycle but with two wheels
  2. 2. a set of six twins
  3. 3. One thousand years
  4. 5. prefix meaning eight
  5. 7. a shape with six sides
  6. 8. a bicycle but with one wheel
  7. 10. prefix meaning six
  8. 12. first in order of food chain
  9. 17. ten years
  10. 18. One hundred years