The crossword with 23 prefixes/suffixes

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Across
  1. 2. a group of 8
  2. 4. an emergency _ _ _ _ _ _ _ _ _ is done by a doctor
  3. 8. able to be ported
  4. 11. hear it wrong
  5. 12. encouragement
  6. 14. an invertebrate with a flattened elongated body composed of many segments
  7. 16. the opposite of hopeless
  8. 17. do something with happiness
Down
  1. 1. do again
  2. 3. James Ruse _ _ _ _ _ _ _ _ _ _ _ High School
  3. 5. a group of 5
  4. 6. I am very _ _ _ _ _ _ _ _ _ after I lost my dog
  5. 7. having no hope
  6. 9. a shape with 8 sides
  7. 10. the position or status of being a citizen of a particular country
  8. 13. even more kind
  9. 15. a volcano ______