| 虚 | xū | emptiness; void; abstract theory or guiding principles; empty or unoccupied; diffident or timid; false; humble or modest; (of health) weak; virtual; in vain |
| 虚心 | xū xīn | modest |
| 虚伪 | xū wěi | false; sham; hypocritical; artificial |
| 虚线 | xū xiàn | dotted line |
| 谦虚 | qiān xū | modest; self-effacing; to make modest remarks |
| 空虚 | kōng xū | hollow; emptiness; meaningless |
| 虚假 | xū jiǎ | false; phony; pretense |
| 虚构 | xū gòu | to make up; fabrication; imaginary |
| 虚弱 | xū ruò | weak; in poor health |
| 虚实 | xū shí | what is true and what is false; (to get to know) the real situation |
| 虚无主义 | xū wú zhǔ yì | nihilism |
| 虚无 | xū wú | nothingness |
| 虚数 | xū shù | imaginary number |
| 虚名 | xū míng | false reputation |
| 弄虚作假 | nòng xū zuò jiǎ | to practice fraud (idiom); by trickery |
| 虚报 | xū bào | to misreport; fraudulent report |
| 虚荣 | xū róng | vanity |
| 虚妄 | xū wàng | fabricated |
| 虚幻 | xū huàn | imaginary; illusory |
| 心虚 | xīn xū | lacking in confidence; diffident; to have a guilty conscience |
| 太虚 | tài xū | great emptiness; the void; heaven; the skies; universe; cosmos; original essence of the cosmos; Taixu (famed Buddhist monk, 1890-1947) |
| 不虚此行 | bù xū cǐ xíng | the trip has not been made in vain; the trip has been well worthwhile; it's been a worthwhile trip |
| 乘虚 | chéng xū | to take advantage of weakness |
| 乘虚而入 | chéng xū ér rù | to enter by exploiting a weak spot (idiom); to take advantage of a lapse |
| 交换虚电路 | jiāo huàn xū diàn lù | Switched Virtual Circuit; SVC |
| 以虚带实 | yǐ xū dài shí | to let correct ideology guide practical work (idiom) |
| 做贼心虚 | zuò zéi xīn xū | to feel guilty as a thief (idiom); to have sth on one's conscience |
| 共轭虚数 | gòng è xū shù | conjugate imaginary number (math) |
| 务虚 | wù xū | to discuss guidelines; to discuss principles to be followed |
| 名不虚传 | míng bù xū chuán | lit. name is not in vain (idiom); a fully justified reputation; enjoys a well-deserved reputation |
| 向壁虚构 | xiàng bì xū gòu | facing a wall, an imaginary construction (idiom); baseless fabrication |
| 向壁虚造 | xiàng bì xū zào | facing a wall, an imaginary construction (idiom); baseless fabrication |
| 固定虚拟连接 | gù dìng xū nǐ lián jiē | Permanent Virtual Connection; PVC |
| 座无虚席 | zuò wú xū xí | lit. a banquet with no empty seats; full house; capacity crowd; standing room only |
| 张若虚 | Zhāng Ruò xū | Zhang Ruoxu (c. 660-720), Tang dynasty poet, author of yuefu poem River on a spring night 春江花月夜 |
| 形同虚设 | xíng tóng xū shè | to exist in name only; empty shell; useless (idiom) |
| 徒拥虚名 | tú yōng xū míng | to possess an undeserved reputation (idiom) |
| 徒有虚名 | tú yǒu xū míng | with an undeserved reputation (idiom); unwarranted fame; nowhere near as good as he's made out to be |
| 故弄玄虚 | gù nòng xuán xū | deliberately mystifying; to make sth unnecessarily complicated |
| 永久虚电路 | yǒng jiǔ xū diàn lù | Permanent Virtual Circuit; PVC |
| 深藏若虚 | shēn cáng ruò xū | to hide one's treasure away so that no-one knows about it (idiom); fig. modest about one's talents; to hide one's light under a bushel |
| 玄虚 | xuán xū | deceitful trick; mystery; unfathomable |
| 发虚 | fā xū | to feel weak; to be diffident |
眼见为实，
耳听为虚 | yǎn jiàn wéi shí ,
ěr tīng wéi xū | to believe what one sees, not what one hears (idiom). Don't believe what people tell you until you see if for yourself.; It ain't necessarily so. |
耳听为虚，
眼见为实 | ěr tīng wéi xū ,
yǎn jiàn wéi shí | Take what you hear to be false, only believe it when you see it (idiom). Don't believe what people tell you until you see if for yourself.; It ain't necessarily so. |
| 脾虚 | pí xū | depletion of the spleen (Chinese medicine) |
| 虚位以待 | xū wèi yǐ dài | to reserve a seat; to leave a position vacant |
| 虚伪类真 | xū wěi lèi zhēn | false but apparently real |
| 虚像 | xū xiàng | virtual image |
| 虚宫格 | xū gōng gé | four-square box in which one practices writing a Chinese character |
