Mysterious world

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Across
  1. 3. noun form of explain
  2. 4. special, only
  3. 6. artificial rather than natural
  4. 8. synonym of kind,type, group
  5. 9. strange and unusual
Down
  1. 1. the way somebody look
  2. 2. a person or animal that is a permanent resident of a particular place or region
  3. 5. to guess or calculate the cost, size, value, etc. of something
  4. 7. strange, not known, or not understood