Home HSK Vocabulary HSK 2 原因 原因 yuán yīn HSK 2 · A2 Meanings cause origin root cause reason Quick facts HSK LevelHSK 2 CEFRA2 ← Back to HSK 2 Overview Practice 原因 with flashcards MandoBridge uses spaced repetition to help you remember HSK 2 vocabulary — free on iOS and Android. ← All HSK 2 vocabulary