Pre- and suffixes

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Across
  1. 4. Acting without a care for danger.
  2. 7. When you are too confident.
  3. 10. Comes paired with progress.
  4. 12. Keeping something safe.
  5. 15. All alone.
  6. 16. Without taste.
  7. 18. You do this at the gate after a flight.
  8. 19. How something or someone looks.
  9. 20. With number ten.
Down
  1. 1. Not written correctly.
  2. 2. Someone with which you work.
  3. 3. Lacking a sense of responsibility.
  4. 5. After the end of the world.
  5. 6. Between planets.
  6. 8. Across the big pond.
  7. 9. Perfect
  8. 11. Very good.
  9. 13. When not a lot of people think about something it is...
  10. 14. The ... between point A and B.
  11. 17. Another word for temperature.