Home / HSK Vocabulary / HSK 6 / 乌云 乌云 wū yún HSK 6 · C1+ Meanings black cloud Quick facts Traditional烏雲 HSK LevelHSK 6 CEFRC1+ ← Back to HSK 6 word list Practice 乌云 with flashcards MandoBridge uses spaced repetition to help you remember HSK 6 vocabulary — free on iOS and Android.