What's the opposite?

1234567891011
Across
  1. 4. cheap
  2. 6. new
  3. 7. long
  4. 8. loose
  5. 11. big
Down
  1. 1. boring
  2. 2. heavy
  3. 3. ugly
  4. 5. cold
  5. 9. slow
  6. 10. difficult