Hard Puzzle

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Across
  1. 3. of many shapes
  2. 5. gas or liquid can pass through it
  3. 7. rotting flesh
  4. 8. a legal investigation
  5. 9. relating to the lungs
  6. 11. so small that it is of no significance
Down
  1. 1. a substance that causes cancer
  2. 2. government in which rich support the poor
  3. 4. purging something
  4. 6. relating to existence
  5. 8. an obstacle to progress
  6. 10. harmful in a cunning or gradual way