dì​xià HSK4

underground

地下 dì​xià
underground place word
physically situated or occurring beneath the surface of the earth

There are many underground passages in big cities.

covert place word
done in secret, often referring to political or illegal activities

They established an underground factory.

Frequency

Movie subtitles
26.2 per million appears in 9% of films
Written text
39.4 per million

Details

HSK 3.0
Level 4

Sources

Definitions
CC-CEDICT