Prefixes meaning "not"

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Across
  1. 3. a state in which things are unfair or not equivalent
  2. 4. to vanish from sight
  3. 5. annoyed at having to wait to do something
  4. 6. not truthful
  5. 7. having little or no knowledge of
  6. 10. lacking a sense of responsibility
  7. 12. not having one's mind firmly made up
  8. 13. casual or indifferent
Down
  1. 1. unsure, doubtful, undetermined
  2. 2. hard or impossible to read
  3. 5. unable to happen
  4. 6. a situation in which people have different opinions that can lead to conflict
  5. 8. not necessary
  6. 9. not using or involving words or speech
  7. 11. not making logical sense