Affixes

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Across
  1. 4. not possible
  2. 5. having one syllable
  3. 7. a shape with five sides
  4. 9. involving squares and second powers
  5. 12. the tenth, formerly eight, month of the year
  6. 14. not able to resist
  7. 15. to be able to reverse the doing of
Down
  1. 1. a unit of the intensity of sound
  2. 2. bad luck
  3. 3. a hundredth of a gram
  4. 6. math dealing with the sides/angles of triangles
  5. 8. not free or generous
  6. 10. find something
  7. 11. freedom from the control of others
  8. 13. having two chambers or branches