宙 (zhòu): eternity, (geology) eon

宙 (zhòu) is a Chinese character meaning “eternity.” Classified as HSK Level 7-9 (HSK 3.0 Standard, CLEC 2022), it is composed of 宀 (semantic) and 由 (phonetic). It ranks #1412 in character frequency (SUBTLEX-CH corpus).

Etymologically derived, 宙 roof - the sky. Its radical form 宀 (roof) appears in many related characters such as 客 (kè, guest, customer), 家 (jiā, home, family), 它 (tā, it).

Spoken pronunciation

Definitions

  1. eternity
  2. (geology) eon

Etymology & Origin

宙

pictophoneticroof - the sky

Decomposition: ⿱宀由 (layout: top-bottom)

Stroke Order

1
2
3
4
5
6
7
8

Practice writing 宙 with real-time feedback — trace each stroke in the correct order and build muscle memory in the HanziFeed app.

Words & Compounds

Common Compounds

WordPinyinMeaning
宇宙nounyǔ zhòuuniverse
宙斯proper-nounzhòu sīZeus
宇宙飞船nounyǔ zhòu fēi chuánspaceship
宇宙射线nounyǔ zhòu shè xiàncosmic ray
显生宙proper-nounxiǎn shēng zhòuPhanerozoic, geological eon lasting since the Cambrian 寒武紀|寒武纪, c. 540m year ago
宙斯盾战斗系统zhòu sī dùn zhàn dòu xì tǒngAegis Combat System (weapons system developed for the US Navy)
太古宙proper-nountài gǔ zhòuArchaean (geological eon before 2500m years ago)
平行宇宙píng xíng yǔ zhòuparallel universe
多元宇宙nounduō yuán yǔ zhòumultiverse (cosmology)
隐生宙yǐn shēng zhòuCryptozoic
元古宙proper-nounyuán gǔ zhòupre-Cambrian (geological eon 2500-645m)
宇宙速度nounyǔ zhòu sù dùescape velocity
宇宙学nounyǔ zhòu xuécosmology
宇宙观nounyǔ zhòu guānworld view
宇宙线nounyǔ zhòu xiàncosmic ray
17
Total compounds
12
As first character
47
As last character
41
As middle character

宙 appears in 17 compound words: 12 as the first character, 47 as the last, and 41 in a middle position. Compound statistics computed from SUBTLEX-CH and HSK 3.0 vocabulary data.

Strongest Collocations

Characters that most frequently co-occur with 宙 in natural Chinese text, ranked by NPMI (Normalized Pointwise Mutual Information) — a statistical measure of association strength.

宇yǔ
0.84179,684 co-occurrences
膨péng
0.469646 co-occurrences
胀zhàng
0.421260 co-occurrences
船chuán
0.3721,876 co-occurrences
怪guài
0.363814 co-occurrences
蜘zhī
0.348148 co-occurrences
蛛zhū
0.342168 co-occurrences
瀚hàn
0.339106 co-occurrences
探tàn
0.330778 co-occurrences
射shè
0.3251,290 co-occurrences

Idioms & Chengyu (3)

宇宙飞船yǔzhòu fēichuánHSK 7+

spacecraft; spaceship

noun
宇宙射线yǔzhòu shèxiànHSK 7+

cosmic ray

noun
宇宙速度yǔzhòu sùdùHSK 7+

cosmic velocity

noun

Example Sentences

AI-Generated

学习宙字需要反复练习,才能写得工整。

xué xí zhòu zì xū yāo fǎn fù liàn xí , cái néng xiě dé gōng zhěng .

Mastering the character "宙" requires repeated practice to write it neatly.

SmzdmMar 2026

电磁场-2.2:我们都是宇宙海洋里的涟漪 #硬核科普 #物理 #量子...

diàn cí chǎng 2 . 2 : wǒ men dōu shì yǔ zhòu hǎi yáng lǐ de 涟 漪 yìng hé kē pǔ wù lǐ liàng zǐ . . .

Electromagnetic Fields - 2.2: We Are All Ripples in the Cosmic Ocean #HardcoreScience #Physics #Quantum...

DigitimesMar 2026

Meta元宇宙梦醒 核心产品停止支援VR装置、重心转向...

M e t a yuán yǔ zhòu mèng xǐng hé xīn chǎn pǐn tíng zhǐ zhī yuán V R zhuāng zhì , chóng xīn zhuǎn xiàng . . .

Meta's Metaverse Dream Fades: Core Product Stops Supporting VR Devices, Shifts Focus to...

TechnewsMar 2026

元宇宙梦碎?Meta 将在 6 月起正式终止 ...

yuán yǔ zhòu mèng suì ? M e t a jiāng zài 6 yuè qǐ zhèng shì zhōng zhǐ . . .

Is the metaverse dream over? Meta will officially discontinue ... starting in June

It之家Mar 2026

新研究揭示:本地宇宙膨胀速度可能比此前认为的更慢

xīn yán jiū jiē shì : běn dì yǔ zhòu péng zhàng sù dù kě néng bǐ cǐ qián rèn wéi de gēng màn

New research reveals: The local universe may be expanding more slowly than previously thought

Hk01.comFeb 2026

日本女偶像水宙翠自拍惊现“胸部变化”引热议 晒照澄清是...

rì běn nǚ ǒu xiàng shuǐ zhòu cuì zì pāi jīng xiàn xiōng bù biàn huà yǐn rè yì shài zhào chéng qīng shì . . .

Japanese female idol Shui Zhoucui's selfie surprised the "breast change" to arouse heated discussions, and the photo clarified that it was...

Tatoeba

宇宙毫无疑问是无限的。

Yǔzhòu háowúyíwèn shì wúxiàn de.

There's no doubt: the universe is infinite.

Tatoeba

宇宙是怎样形成的?

Yǔzhòu shì zěnyàng xíngchéng de?

How was the universe formed?

Tatoeba

宇宙里有多少个星系呀?

Yǔzhòu lǐ yǒu duōshao gè xīngxì ya?

How many galaxies are there in the universe?

Tatoeba

谣传一架宇宙飞船在上海附近被见到了。

Yáochuán yī jià yǔzhòufēichuán zài Shànghǎi fùjìn bèi jiàndào le.

It is rumoured that a spaceship has been seen near Shanghai.

Character Family

Semantic Family — Characters sharing the 宀 (roof - the sky) component

Homophones — Characters pronounced zhòu

Frequently Asked Questions

What does 宙 (zhòu) mean in Chinese?
宙 (zhòu) primarily means "eternity." It is classified as HSK Level 7-9, making it an expert-level character. It ranks #1412 in character frequency.
What's the difference between 宙 and 油?
宙 (zhòu) and 油 (yóu) are often confused. confusable. The key distinguishing feature: 宀 vs 氵 (same 由 component).
How many strokes does 宙 have?
宙 is written with 8 strokes. The correct stroke order matters for recognition and handwriting speed — practice with the animated guide above to build proper technique.
What is the radical of 宙?
The radical associated with 宙 is 宀 (roof). This radical appears in many characters related to roof.
What are the components of 宙?
宙 is composed of: 宀 (semantic), 由 (phonetic). Its IDS decomposition is ⿱宀由 with a top-bottom layout. Understanding the components helps with both memorization and recognizing related characters.
What are common words containing 宙?
Common words with 宙 include: 宇宙 (yǔ zhòu, "universe"); 宙斯 (zhòu sī, "Zeus"); 宇宙飞船 (yǔ zhòu fēi chuán, "spaceship"); 宇宙射线 (yǔ zhòu shè xiàn, "cosmic ray"); 显生宙 (xiǎn shēng zhòu, "Phanerozoic, geological eon lasting since the Cambrian 寒武紀|寒武纪, c. 540m year ago"). There are over 17 compound words containing this character.
What characters sound the same as 宙 (zhòu)?
Several characters share the pronunciation zhòu: 轴 (axis), 周 (week, around), 州 (prefecture), 洲 (continent), and 1 more. Context and tones help distinguish between them in speech and writing.
Is 宙 the same in simplified and traditional Chinese?
Yes, 宙 is written the same way in both simplified and traditional Chinese.

Practice writing 宙 with real-time feedback

Trace stroke sequences, hear spoken pronunciation, and build lasting retention with spaced repetition in the HanziFeed app.

Character data sourced from Unihan (Unicode Consortium), SUBTLEX-CH frequency corpus (Cai & Brysbaert, 2010), and Make Me a Hanzi (stroke data). Collocation strength measured via NPMI (Normalized Pointwise Mutual Information). Verified by the HanziFeed linguistics team.

HSK classification follows the HSK 3.0 Standard (Center for Language Education and Cooperation, CLEC, 2022 revision). Idiom data from Wiktionary (CC BY-SA 3.0).

Data last verified: March 2026.