Traditional: 烏雲
乌云 (wū yún) means “black cloud”. It is an HSK 6 Chinese word (traditional 烏雲) in the HSK 3.0 vocabulary.
Practice each character:
天空布满了乌云。
Tiānkōng bùmǎn le wūyún.
The sky is covered with dark clouds.
Updated: 2026-07-18