Impoverished describes being really, really poor, either from having no money or being in bad health. A person who lives on the street is impoverished, and a country may become impoverished after a devastating war.
Impoverished comes from the Old French word povre, which means “poor,” and you can almost see the word poverty inside impoverished. Living an impoverished life means that your finances and health are not in good shape, and in fact you could die because you can’t support yourself. A corrupt and greedy government makes its citizens impoverished, and too much pollution will create impoverished soil that isn’t healthy enough to grow delicious vegetables.