Amazing Antonyms!

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Across
  1. 3. An antonym of unhappy
  2. 5. An antonym of unafraid
  3. 6. An antonym of complicated
  4. 7. An antonym of stop
  5. 8. An antonym of safe
  6. 10. An antonym of excited
Down
  1. 1. An antonym of pleasant
  2. 2. An antonym of insecure
  3. 4. An antonym of negative
  4. 9. An antonym of merry