Prefixes and suffixes

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Across
  1. 3. Something is not important
  2. 7. Not happy
  3. 8. When you know you are pretty
  4. 12. No one can do it
  5. 13. The things you do/eat/drink before you sport
  6. 15. Your grandpa has a lot of......in life
  7. 16. The one after ninety-ninth
  8. 17. You need this to push a car
  9. 18. A person who is very smart has a lot of.....
  10. 19. A thing that is against law
  11. 20. Not the weather but the......
Down
  1. 1. The person you work for and that looks after you
  2. 2. A product you bring back to the store is....
  3. 4. Two people starts a business, they are.....
  4. 5. The opposite of strong
  5. 6. If you have to wait long but keep calm
  6. 9. The notebook was there but now it is gone
  7. 10. Everyone must keep 1,5 m from another person
  8. 11. Being very nice to other people
  9. 14. You think someone can't do something while he can