IPA: /ˈʌndəˌklæs/
KK: /ˈʌndərˌklæs/
The lowest level of society, often made up of people who are poor or disadvantaged and have limited access to resources and opportunities.
Many programs aim to help the underclass improve their living conditions and access to education.
Underclass → It is formed from "under" (from Old English "under", meaning beneath or below) and "class" (from Latin "classis", meaning a division or group). The term "underclass" refers to a social class that is beneath the mainstream or upper classes in society.
Think of being 'beneath' ('under') the main 'group' ('class') in society — that's what underclass means.