without the money, possessions, education, opportunities, etc. that the average person has

Children from an underprivileged family background are statistically more likely to become involved in crime. 据统计，出身贫寒家庭的孩子更容易犯罪。

polite phrase for poor people

The charity raises money for holidays for the underprivileged. 该慈善机构为贫困民众筹款过节。