People who are disadvantaged or live in disadvantaged areas live in bad conditions and tend not to get a good education or have a reasonable standard of living.
例句
...the educational problems of disadvantaged children...貧困兒童的教育問題The centre aims to help disadvantaged areas of Europe, mainly by fostering new businesses.該中心旨在幫助歐洲的貧困地區，方法主要是通過扶持新型商業。
英英詞典釋義
Adjective
1. marked by deprivation especially of the necessities of life or healthful environmental influences;
"a childhood that was unhappy and deprived, the family living off charity""boys from a deprived environment, wherein the family life revealed a pattern of neglect, moral degradation, and disregard for law"