Adjectives for describing inventions

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Across
  1. 1. Highly developed, complex, or showing a high level of skill
  2. 4. Having great strength, force
  3. 5. Great or important enough to be worthy of attention
  4. 6. Inexpensive
Down
  1. 2. Using new ideas, methods, or creative thinking to make something better
  2. 3. The rate at which goods are produced or work is completed