verb
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to cause to grow gradually in some way.
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to build up or expand (a business, industry, etc.).
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to cause (one's personality, a bud, etc.) to unfold or evolve gradually.
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to immerse (an exposed film, plate or printing paper) in various chemical solutions in order to make the picture visible.
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to become larger, fuller, better, etc.; grow or evolve, esp. by natural processes.
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to attain prosperity; to prosper.