Opposites!

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Across
  1. 1. opposite to happy
  2. 2. opposite to short
  3. 3. opposite to late
  4. 6. opposite to wrong
  5. 8. opposite to low
  6. 9. opposite to slow
Down
  1. 1. opposite to big
  2. 4. opposite to poor
  3. 5. opposite to last
  4. 7. opposite to give