-able, kilo, ultra

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Across
  1. 3. A measure of heaviness
  2. 8. Easy to stay away from
  3. 10. A small unit of digital information
  4. 11. Mistakes that can be understood
  5. 12. Not very strong at all
  6. 14. In good enough condition to be used
  7. 15. Can be detached or unfastened
Down
  1. 1. Very, very heavy
  2. 2. Easy to guess or know in advance
  3. 4. Not too hard to handle
  4. 5. A large unit for measuring liquids
  5. 6. Extremely cautious and attentive
  6. 7. Priced just right for your pocket
  7. 9. Having an abundance of money and possessions
  8. 13. Things that fit neatly on top of each other