Roman Numerals

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Across
  1. 3. This means 4.
  2. 5. This Latin preposition means without.
  3. 6. The English meaning of this Greek word is much or many.
  4. 9. What is the numerical value of V?
  5. 11. This word literally translates to we do not know.
  6. 13. This Latin preposition means against.
  7. 14. This Greek preposition means over or beyond.
  8. 16. The word for one in Russian.
  9. 17. The word for two in Russian.
  10. 18. This Latin preposition means in front of or on.
Down
  1. 1. Primum means ________.
  2. 2. This means 5.
  3. 4. What is the numerical value of II?
  4. 6. The English meaning of this Greek word is large or great.
  5. 7. The word for three in Albanian.
  6. 8. This word means 1,000.
  7. 10. This Latin preposition means within.
  8. 12. This Greek preposition means with or together.
  9. 13. This literally translates to I believe.
  10. 15. A sextet has how many members?