Home HSK Vocabulary HSK 4 字母 字母 zì mǔ HSK 4 · B2 Meanings letter (of the alphabet) Quick facts HSK LevelHSK 4 CEFRB2 ← Back to HSK 4 Overview Practice 字母 with flashcards MandoBridge uses spaced repetition to help you remember HSK 4 vocabulary — free on iOS and Android. ← All HSK 4 vocabulary