虛 Simplified: 虚 On the HSK 7-9 vocabulary list, at CEFR level C2. xū ㄒㄩ emptiness void abstract theory or guiding principles empty or unoccupied diffident or timid false humble or modest weak of health virtual in vain Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0 国际中文教育中文水平等级标准, 中华人民共和国教育部, MIT