to cause to grow gradually in some way.

to build up or expand (a business, industry, etc.).

to cause (one's personality, a bud, etc.) to unfold or evolve gradually.

to immerse (an exposed film, plate or printing paper) in various chemical solutions in order to make the picture visible.

to become larger, fuller, better, etc.; grow or evolve, esp. by natural processes.

to attain prosperity; to prosper.