unprosperous

adjective

1. having or characterized by financial success or good fortune; flourishing; successful: a prosperous business.
2. well-to-do or well-off: a prosperous family.
3. favorable or propitious.

adjective

1. flourishing; prospering
2. rich; affluent; wealthy
3. favourable or promising

adj.early 15c., “tending to bring success,” from prosper + -ous, or else from obsolete Middle French prospereus (15c.), from prosperer. The sense of “flourishing” is first recorded late 15c.