Power Spelling #16: Adding Prefixes

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Across
  1. 3. Any member of a class of words found in many languages that are used before nouns, pronouns, or other substantives to form phrases functioning as modifiers of verbs, nouns, or adjectives, and that typically express a spatial, temporal, or other relationship
  2. 5. Preceding and leading up to the main part, matter, or business; introductory; preparatory
  3. 7. Not necessary or essential; needless; unessential
  4. 8. An act, process, or method of computing; calculation
  5. 10. Not predictable; not to be foreseen or foretold
Down
  1. 1. To settle or decide in advance
  2. 2. To establish the truth, accuracy, validity, or genuineness of; corroborate; verify
  3. 4. Not voluntary; independent of one's will; not by one's own choice
  4. 6. To state or assert positively; maintain as true
  5. 9. Not in a direct course or path; deviating from a straight line; roundabout