Greek and Latin Words

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Across
  1. 4. person of 90 years of age
  2. 6. Latin word for 'tenth'
  3. 8. Latin word for 'one and a half'
  4. 10. Greek word for 'first'
  5. 13. 1885 in Roman numerals
  6. 14. LXXXIX (includes hyphen)
  7. 15. Greek word for 'second'
  8. 16. Arabic word for 'emptiness'
  9. 18. Latin word for 'both'
  10. 19. Latin word(s) for 'four'
Down
  1. 1. Greek meaning 'running back again'
  2. 2. Greek word for 'two'
  3. 3. Latin word for 'four'
  4. 4. XXIX
  5. 5. Greek word for 'ten thousand'
  6. 7. Latin word for 'nothing'
  7. 9. If you are an octuplet, how many siblings would you have?
  8. 11. Example word for 'third'
  9. 12. Greek word for 'fullness'
  10. 17. Greek word for 'nine'
  11. 20. one form of the Latin word for 'single, alone'