Prefix (1&2) and Suffix (1)

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Across
  1. 5. meaning of the prefix pre
  2. 6. if you are currently on a hike you are ___
  3. 8. a person who does not tell the truth is ___
  4. 9. the most funny
  5. 11. a polygon with three angles
  6. 14. ability to speak two languages
  7. 15. more than one fox
  8. 16. to exist with others
  9. 17. someone or something that is not helpful
Down
  1. 1. opposite of freezing with prefix de
  2. 2. a person who swims
  3. 3. spell a word incorrectly
  4. 4. meaning of the prefix re
  5. 7. school work that is not finished
  6. 10. a person who invents
  7. 12. a mythical animal with one horn
  8. 13. someone who is fast moves ___