un

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Across
  1. 3. an unspecified or unknown thing
  2. 5. a delay due to uncertainty of mind
  3. 6. a title of respect prefixed to a man's name or position
  4. 9. last name of the best biology teacher on earth
  5. 10. ISO 3166 of the dominican republic
Down
  1. 1. The act of replacing a value by another that is approximately equal but has a more explicit representation
  2. 2. abbr. for Islamic State
  3. 4. with respect to mathematics
  4. 7. often abbreviated by w/o
  5. 8. used to express an intention or inclination. tense of "will"