dǐ​céng HSK7

ground floor

底层 (底層) dǐ​céng
ground floor noun
the lowest floor of a building or the bottom layer of a structure

The ground floor of this apartment building consists of shops.

lowest rung noun
the bottom level of a social hierarchy or system; the grassroots or underclass

His novels primarily depict the lives of people at the bottom of the social ladder.

Frequency

Movie subtitles
2.86 per million appears in 1% of films
Written text
6.10 per million

Details

HSK 3.0
Level 7

Sources

Definitions
CC-CEDICT