Re- Un- and Dis-

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Across
  1. 4. Visit again; return to
  2. 6. Apply again; put on once more
  3. 8. Visit again; put on once more
  4. 9. Not like; feel against
  5. 11. Take the cover off; reveal
  6. 12. Not sure; doubtful
Down
  1. 1. Not usual; different or rare
  2. 2. Write again; change the writing
  3. 3. Not agree; have a different opinion
  4. 5. Response to something that happens
  5. 7. Ignore; pay no attention
  6. 10. Not happy; feeling sad.