This is the 3074th most frequent Japanese word.
下層
"Lower layer" or "lower class."
Here, "下層" is used to describe the lower strata or levels within social hierarchy, indicating socioeconomic status.
社会の下層にいる人々が支援を必要としている。
People in the lower strata of society need support.
In this example, "下層" refers to the lower physical layer or position, specifically related to structural placement.
この家の土台部分は下層に位置しています。
The foundation part of this house is located at the lower layer.
Here, "下層" is used in a scientific context to describe the lower layer of the atmosphere or air, differentiating it vertically.