Prefix 'in', 'im' and 'un' crossword

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Across
  1. 2. infinite; limitless
  2. 3. not right
  3. 4. blemished; not perfect
  4. 6. unexplained; inexplicable
  5. 7. for an unlimited or unspecified period of time
  6. 8. thinking or acting for oneself
  7. 9. valuable; crucial
Down
  1. 1. not satisfactory or allowable
  2. 5. acting without consideration; thoughtless
  3. 7. not possible