These words all describe somebody who has very little or no money and therefore cannot satisfy their basic needs.
poorhaving very little money; not having enough money for basic needs:
They were too poor to buy shoes for the kids.他们穷得没钱给孩子买鞋穿。
disadvantagedhaving less money and fewer opportunities than most people in society:
socially disadvantaged sections of the community该社区社会地位低下的贫困阶层
needypoor:
It’s a charity that provides help for needy children.这是一个为贫困孩子提供援助的慈善机构。
impoverished(journalism) poor:指缺乏生活必需品的、贫困的：
Thousands of impoverished peasants are desperate to move to the cities.成千上万赤贫的农民急切盼望搬到城里去。
deprived[usually before noun] without enough food, education, and all the things that are necessary for people to live a happy and comfortable life指贫穷的、穷困的、穷苦的
poor, needy, impoverished or deprived?用 poor、needy、impoverished 还是 deprived？Poor is the most general of these words and can be used to describe yourself, another individual person, people as a group, or a country or an area. Needy is mostly used to describe people considered as a group: it is not used to talk about yourself or individual people: poor/needy children/families • They were too needy to buy shoes for the kids.Impoverished is used, especially in journalism, to talk about poor countries and the people who live there. To talk about poor areas in rich countries, use deprived.
penniless(literary) having no money; very poor:指一文不名的、穷困的：
He died penniless in Paris.他死于巴黎，死时身无分文。
hard up(informal) having very little money, especially for a short period of time:尤指暂时拮据、缺钱：