Prefixes un-, dis-, pre-, over-, non-

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Across
  1. 1. Opposite of lock; not locked
  2. 3. Opposite of happy; not happy
  3. 7. Not ripe
  4. 11. Eat too much
  5. 12. Cook too much
  6. 13. Not fat
  7. 14. View before
  8. 15. Opposite of respect; not respect
  9. 17. Heat before
  10. 18. Not pleasant; opposite of pleasant
Down
  1. 1. Opposite of zip; not zip
  2. 2. Opposite of agree
  3. 4. Opposite of acceptable; not acceptable
  4. 5. Opposite of honest; not honest
  5. 6. Charged too much
  6. 8. Get something ready before
  7. 9. Not obey; opposite of obey
  8. 10. Slept too much
  9. 13. Opposite of stop; not stop
  10. 16. Not fair; opposite of fair