World of vocabulary

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Across
  1. 4. make a twittering or chattering sound
  2. 5. falling; sinking
  3. 10. lacking energy and enthusiasm
  4. 11. being in the control of
  5. 14. intensely deep or bright color
  6. 16. satisfaction
  7. 17. covered
  8. 18. the ability to deal with any kind of hardship
  9. 19. extremely worried
Down
  1. 1. rough or confused
  2. 2. showing no sign of worry or anxiety
  3. 3. a prehistoric now extant
  4. 4. top of a hill
  5. 6. relaxed
  6. 7. friendly and pleasant
  7. 8. prescribed course of exercise and diet
  8. 9. tranquil
  9. 12. flexible
  10. 13. uncontrollable anger
  11. 15. without boasting