Revision puzzle 8

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Across
  1. 3. Joyful
  2. 4. Merciless
  3. 7. Clear
  4. 8. Gloomy
  5. 9. Leafy
  6. 10. Real
  7. 16. Stubborn
  8. 18. Easy to read
  9. 19. Not give up
  10. 20. Hurry
Down
  1. 1. Hardship
  2. 2. Instinct
  3. 5. Thorough
  4. 6. Harmless
  5. 11. Understanding
  6. 12. Secret
  7. 13. Remove
  8. 14. Determined
  9. 15. Unbeatable
  10. 17. Peaceful