verb
expand
ik-SPAND/ɪkˈspænd/
To increase the size or extent of something.
The balloon expands as the child blows air into it.

Etymology
The pieces mean “spread out,” giving the image of something unfolding or stretching over more space. This connects physical enlargement with making a subject broader or more detailed.
In context
Miss Lee also wants to become a tour guide when she graduates from a tourism school. The new bridge may very well help expand her career opportunities.
More examples
- The bakery plans to expand its kitchen.
- Reading widely expands your knowledge of the world.
- Could you expand on your idea for the project?
Forms
expand · expands · expanded · expanding
expansion noun — An increase in size, extent, or scope.
expandable adjective — Able to become larger in size.