Prefix dis- un-

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Across
  1. 3. Not lucky, bad fortune.
  2. 6. To not like.
  3. 8. Not certain or confident.
  4. 9. To open.
  5. 10. To have a different opinion.
Down
  1. 1. Sad or miserable.
  2. 2. To be doubtful or suspicious.
  3. 4. Not flat, wobbly, not fair.
  4. 5. Lie, cheat, or steal.
  5. 7. To vanish from sight.