Jack

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Across
  1. 2. obstructed the road.
  2. 5. a part broken off or detached:
  3. 8. to furnish with knowledge, especially by a systematic method; teach; train; educate.
  4. 10. to block or close up with an obstacle; make difficult to pass:
  5. 11. the act of breaking or bursting:
Down
  1. 1. mode of building, construction, or organization; arrangement of parts, elements, or constituents:
  2. 3. Mathematics.
  3. 4. to cause disorder or turmoil in:
  4. 6. serving or designed to destroy:
  5. 7. to burst forth:
  6. 9. to build or form by putting together parts; frame; devise.