Green Group -less suffix

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Across
  1. 2. Without pain
  2. 4. Having no end; continuing forever.
  3. 7. You will not pass the test _______ you study hard
  4. 8. Unable to relax or stay still.
  5. 9. Without joy or happiness; sad and depressing.
Down
  1. 1. Concerned more with the needs and happiness of others than with one's own.
  2. 3. Without a purpose or goal.
  3. 5. Completely clean; without any dirt or marks.
  4. 6. Without wires.
  5. 7. Not useful; of no value.