What's Holding You Back?

12345678
Across
  1. 1. to include everything between two limits
  2. 3. the shape or outline of something
  3. 5. the ability to do something for a long time
  4. 7. designed to move easily in water or air
  5. 8. packed together; not spread out
Down
  1. 2. well and without wasting effort
  2. 4. to increase or add to
  3. 6. to work against something