Prefixes un- and il-

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Across
  1. 2. Not level, or smooth
  2. 3. Not necessary or essential; needless; unessential
  3. 5. Not likely to happen
  4. 7. In a manner that lacks logic or reason, or in a way that doesn't follow a logical system or plan
  5. 9. Not realistic
  6. 10. deceptive; illusory
Down
  1. 1. Not eating healthy
  2. 4. Not authorized by the law; not in accordance with accepted standards or rules
  3. 6. The action of inferring or drawing a conclusion
  4. 8. Not equal in quantity, size, or value
  5. 9. Not liked or popular