Gainful (adjective)

Producing or providing a financial gain or profit.

Origin:

From the verb "to gain".

Examples:

1. The business was not gainful, and eventually had to close.
2. He found a gainful employment opportunity after months of searching.
3. The investment proved to be gainful in the long run.
4. She pursued a gainful career in the field of finance.
5. The new product was expected to be a gainful addition to the company's revenue.