Etymology

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Across
  1. 2. soli means what
  2. 3. nineteen is what number
  3. 4. Tetra means what
  4. 6. Penta
  5. 7. deca means what
  6. 8. Ambi means what
  7. 11. XI is what number
  8. 12. four in Roman numerals
  9. 14. ninth in Latin ordinal numbers
  10. 16. twenty in Roman numerals
  11. 18. bi means what
  12. 19. Semi means what
  13. 21. third in Latin ordinal numbers
Down
  1. 1. tenth in Latin ordinal numbers
  2. 4. V is what number
  3. 5. LIII what number
  4. 9. Uni means what
  5. 10. sept means what
  6. 13. LXIV what number
  7. 15. Mono means what
  8. 17. ennea means what
  9. 20. first in Latin ordinal numbers