vocab puzzle

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Across
  1. 2. distance traveled per unit time in one direction
  2. 6. relating to the motion of material bodies and their forces
  3. 8. reflect deeply on a subject
  4. 9. in a pensively sad manner
  5. 11. a continuous portion of a circle
  6. 12. a cry of sorrow and grief
  7. 13. a specialist in the treatment of mental disorders
  8. 14. formed or developed from something else; not original
  9. 15. give back less money than is due to someone who has overpaid
Down
  1. 1. the diagnosis and treatment of mental disorders
  2. 3. a subtle difference in meaning or opinion or attitude
  3. 4. referring back to itself
  4. 5. the act of imitating the behavior of some situation
  5. 7. constituting a separate entity or part
  6. 10. a fervent and even militant proponent of something