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空 — pronunciations, definitions, and tags
HanziPinyinEnglishTags
空kōngemptyHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kōngairHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kōngskyHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kōngin vainHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kōngto emptyHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kōngvacantHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kōngunoccupiedHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kōngspaceHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kōngleisureHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kōngfree timeHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kōnghollow, empty, deserted, bareHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kòngemptyHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kòngairHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kòngskyHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kòngin vainHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kòngto emptyHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kòngvacantHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kòngunoccupiedHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kòngspaceHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kòngleisureHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kòngfree timeHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
空kònghollow, empty, deserted, bareHSK 4, n, 8 strokes, radical 穴, rank #1280, Medium
kōng(kong1)kong
primary
T1
  1. 1empty
  2. 2air
Listen to the audio pronunciation 3 times to gain XP
March 24, 2026

空kōng(kong1)

The character 空 (kōng) primarily means 'empty' or 'vacant.' It is commonly used in contexts relating to physical emptiness, such as an empty room, as well as metaphorical emptiness, like having free time. Additionally, it can refer to the sky or air, emphasizing its versatile usage in everyday language.

Strokes8Radical穴Frequency#1280DifficultyMedium
Cultural note

In Chinese culture, the concept of emptiness (空) is often valued in philosophical contexts, particularly in Daoism, where it symbolizes openness and potential. This is reflected in sayings that emphasize the importance of 'emptying' the mind to achieve clarity.

Memory tip

Imagine a vast sky (空) that is completely empty, with no clouds or birds in sight. The character 空 looks like an open space, reminding you of a large area without anything in it. To remember its pronunciation, think of a 'cone' (kōng) that is hollow inside, symbolizing emptiness.

Meanings of 空

kōng(kong1)
primary
1empty
2air
Exercise 1 of 3

By ear

Play it, then pick what 空 means.

About 空

空Simplified
8Strokes
穴Radical
形容词xíngróngcíadnv (adj.)Part of Speech
#1280Frequency Rank
HSK 2.0L4HSK 3.0L4ElementaryTOCFLL3HSKKL2CEFRA2

Podcast: 空

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Podcast: 空

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AI study notes for 空

Quick Contrast

空 (kōng) vs 空虚 (kōngxū) — use 空 for physical emptiness or vacancy, while 空虚 emphasizes a sense of emptiness or hollowness, often in a metaphorical or emotional context.

Usage Notes

Learners often confuse 空 with similar-sounding words, such as 空气 (kōngqì, air) or 空闲 (kōngxián, leisure time). This character is versatile and can be used in both formal and informal contexts; however, ensure proper tone usage to convey the intended meaning accurately. Common collocations include 空房间 (kōng fángjiān, empty room) and 空中 (kōng zhōng, in the air).

HSK Study Tips

As an HSK Level 4 word, 空 connects well with other words related to space and absence, like 有 (yǒu, to have) and 没有 (méiyǒu, to not have). Focus on practicing its use in sentences to solidify understanding, especially in contexts discussing time and space.

Common Mistakes

Learners often misuse 空 when they mean 'full' or 'occupied,' leading to errors like saying '这间房间是空的' (This room is full) instead of '空的.' Be careful to use 空 only when referring to something that is genuinely empty.

AI-enhanced 2026-03-24

Pronunciation of 空

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Etymology of 空

Formation typepictophonetic
六书 ClassificationPhono-semantic (形声字)~80-90% of characters
Explanation

Phonosemantic compound. 穴 represents the meaning and 工 represents the sound.

Memory hint

cave

Semantic (meaning)穴
+
Phonetic (sound)工
Learn more about Phono-semantic (形声字) characters
Exercise 1 of 1

Origin

空 = 穴 + 工. What kind of character does that make it?

Decomposition of 空

IDS Structure⿱穴工
空Full character
=
穴xue2
top
工gong1
bottom
Exercise 1 of 2

Parts

Which of these is part of 空?

How to say empty in Chinese

“empty” in Chinese is空kōng

The character 空 (kōng) primarily means 'empty' or 'vacant.' It is commonly used in contexts relating to physical emptiness, such as an empty room, as well as metaphorical emptiness, like having free time. Additionally, it can refer to the sky or air, emphasizing its versatile usage in everyday language.

When to use 空

Learners often confuse 空 with similar-sounding words, such as 空气 (kōngqì, air) or 空闲 (kōngxián, leisure time). This character is versatile and can be used in both formal and informal contexts; however, ensure proper tone usage to convey the intended meaning accurately. Common collocations include 空房间 (kōng fángjiān, empty room) and 空中 (kōng zhōng, in the air).

空 or something close to it

空 (kōng) vs 空虚 (kōngxū) — use 空 for physical emptiness or vacancy, while 空虚 emphasizes a sense of emptiness or hollowness, often in a metaphorical or emotional context.

What learners get wrong

Learners often misuse 空 when they mean 'full' or 'occupied,' leading to errors like saying '这间房间是空的' (This room is full) instead of '空的.' Be careful to use 空 only when referring to something that is genuinely empty.

Write 空

空

Practice writing 空 stroke by stroke. Watch the animation to learn the stroke order, then try writing it yourself.

Write correctly 3 times to earn XP

Grammar patterns of 空

空 functions as a noun — it names a person, place, thing, or concept. Place it as a subject before the verb (主+谓) or as an object after the verb (谓+宾). Most Chinese nouns require a measure word between the number and the noun (e.g. 一个/三本). It carries 11 related meanings, each with its own usage notes below. The example sentences below show it in action, with practice buttons (Listen, Practice Writing, Practice Speaking) on every line.

Exercise 1 of 4

Fill the gap

Type the missing word. Pinyin works; then pick the character.

舒服什么啊,办公室____调坏了。

Comfortable? The office AC is broken!

Common confusions with 空

空vs孔
kǒng

Similar shape but different meaning and pronunciation.

空vs控
kòng

Same initial consonant but different meaning.

Exercise 1 of 1

Which one

Which one means “empty”?

or

Example sentences for 空 (16)

Listen to all sentences once to receive XP
1
定期航班的数量正让空中交通指挥系统不堪重负。

dìngqī hángbān de shùliàng zhèng ràng kōngzhōng jiāotōng zhǐhuī xìtǒng bùkān zhòng fù。

The volume of scheduled flights is straining the air traffic control system.
2
“沙锥鸟”战斗机的驾驶舱空间不太宽敞。

“ Shā zhuī niǎo” zhàndòu Jī de jiàshǐ cāng kōngjiān bùtài kuānchang。

There was not much elbow room in the cockpit of a Snipe.
3
外面的空气沉滞、潮湿而闷热。

wàimiàn de kōngqì chén zhì、 cháoshī ér mēnrè。

The outside air was heavy and moist and sultry.
4
空气中充满诱人的烤牛肉香味。

kōngqì zhōng chōngmǎn yòurén de kǎo niúròu xiāngwèi。

A tantalising aroma of roast beef fills the air.
5
如果你有空的话,周三晚上来和我们一起吃晚饭吧。

rúguǒ nǐ yǒu kōng dehuà, zhōu sān wǎnshang lái hé wǒmen yìqǐ chī wǎnfàn ba。

Come and have supper with us on Wednesday, if you're free.
6
你可以在页边空白处添加评论使文件变得富有个性。

nǐ kěyǐ zài yè biān kòngbái chǔ tiānjiā pínglùn shǐ wénjiàn biàn de fùyǒu gèxìng。

You can individualize a document by adding comments in the margins.
7
即使平放,这个真空水杯也是滴水不漏。

jíshǐ píng fàng, zhège zhēnkōng shuǐ bēi yě shì dī shuǐ bù lòu。

The flask is completely watertight, even when laid on its side.
8
他的目的是使空间站项目全面停止。

tā de mùdì shì shǐ kōngjiānzhàn xiàngmù quánmiàn tíngzhǐ。

His objective was to kill the space station project altogether.
9
这家航空公司亏损达3,500万美元,而澳航出资帮助其摆脱了困境。

zhè jiā hángkōng gōngsī kuīsǔn dá3,500 wàn měiyuán, ér ào háng chūzī bāngzhù qí bǎituō le kùnjìng。

The airline had losses of $35m and was bailed out by Qantas.
10
树林上空飘浮着一股烟。

shùlín shàngkōng piāofú zhe yī gǔ yān。

There was a drift of smoke above the trees.
11
他站在空旷的房间里,感到一阵孤独。

Tā zhàn zài kōngkuàng de fángjiān lǐ, gǎndào yī zhèn gūdú.

He stood in the empty room, feeling a sense of loneliness.
12
由于这座城市的经济衰退,许多商店的橱窗都空着。

Yóuyú zhè zuò chéngshì de jīngjì shuāituì, xǔduō shāngdiàn de chúchuāng dōu kōngzhe.

Due to the city's economic downturn, many shop windows are empty.
13
他站在空旷的房间里,感到一阵孤独。

Tā zhàn zài kōngkuàng de fángjiān lǐ, gǎndào yī zhèn gūdú.

He stood in the empty room, feeling a sense of loneliness.
14
由于这座城市的经济衰退,许多商店的橱窗都空着。

Yóuyú zhè zuò chéngshì de jīngjì shuāituì, xǔduō shāngdiàn de chúchuāng dōu kōngzhe.

Due to the city's economic downturn, many shop windows are empty.
15
他站在空旷的房间里,感到一阵孤独。

Tā zhàn zài kōngkuàng de fángjiān lǐ, gǎndào yī zhèn gūdú.

He stood in the empty room, feeling a sense of loneliness.
16
由于这座城市的经济衰退,许多商店的橱窗都空着。

Yóuyú zhè zuò chéngshì de jīngjì shuāituì, xǔduō shāngdiàn de chúchuāng dōu kōngzhe.

Due to the city's economic downturn, many shop windows are empty.

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Cultural Notes for 空

💡Did you know?

在中国文化中,天空被视为一种重要的元素。古代中国人相信,天空是神灵居住的地方,代表着权力和希望。这个词‘空’也与宇宙的无限和空灵的概念相连。

Word Family of 空

Compounds20
控kòngto control
腔qiāngcavity of body
椌qiāng
倥kōngboorish, ignorant; urgent, pressing
崆kōngthe Kongtong mountain
悾kōng
曌zhào
焢hōnganger, rage; slow-braised pork belly
箜kōngancient Chinese harp
鞚kòng
啌xiāng
埪kōng
涳kōng
瞾zhào
硿kōng
羫qiāng
聜dǐ
谾hōng
躻kōng
鵼kōng
Words containing this character20
空间kōngjiānspace空間
空kōngempty
空气kōngqìair空氣
航空hángkōngaviation
天空tiānkōngsky
太空tàikōngouter space
空中kōngzhōngin the sky
有空yǒukòngto have time (to do sth)
空调kōngtiáoair conditioning空調
空军kōngjūnair force空軍
时空shíkōngtime and place時空
空白kòngbáiblank space
上空shàngkōngoverhead
空虚kōngxūhollow空虛
空手kōngshǒuunarmed
航空公司hángkōnggōngsīairline
空前kōngqiánunprecedented
星空xīngkōngstarry sky
空地kòngdìvacant land
高空gāokōnghigh altitude
Exercise 1 of 4

Characters with 空

What does 控 mean?

Frequently asked questions about 空

Yes, 空 is used in various idioms and expressions in Chinese. For example, '空谈' (kōng tán) means 'empty talk' or 'talking in vain', emphasizing the idea of speaking without substance.

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