Home / HSK Vocabulary / HSK 2 / 忽然 忽然 hū rán HSK 2 · A2 Meanings suddenly; all of a sudden Quick facts HSK LevelHSK 2 CEFRA2 ← Back to HSK 2 word list Practice 忽然 with flashcards MandoBridge uses spaced repetition to help you remember HSK 2 vocabulary — free on iOS and Android.