Etymology workshop

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Across
  1. 4. : A lack of agreement (prefix dis-)
  2. 8. : Study of life (Greek: bio + logy)
  3. 9. : Not happy
  4. 12. : One’s own handwritten signature (Greek: auto + graph)
  5. 14. : Study of the Earth (Greek: geo + graphy)
  6. 15. : Working by itself (prefix auto-)
  7. 16. : Without hope (suffix -less)
  8. 19. : Government by the people (Greek: demo + cracy)
  9. 20. : Not able to be seen (prefix in- + root vis)
Down
  1. 1. : Quality of being easy to read (root read + suffix -ability)
  2. 2. : Without care or attention (suffix -less)
  3. 3. : Process of changing form (prefix trans- + root form)
  4. 5. : Device for speaking over distance (Greek: tele + phone)
  5. 6. : Picture made with light (Greek: photo + graph)
  6. 7. : To play again
  7. 10. : Tool for viewing small things (Greek: micro + scope)
  8. 11. : To build or arrange parts (Latin root struct)
  9. 13. : To move or carry across (Latin: trans + port)
  10. 17. : To write again (prefix re-)
  11. 18. : Easy to foresee (prefix pre- + root dict)