固 (gù): hard, strong, solid

固 (gù) is a Chinese character meaning “hard.” Classified as HSK Level 5 (HSK 3.0 Standard, CLEC 2022), it is composed of 囗 (semantic) and 古 (phonetic). It ranks #893 in character frequency (SUBTLEX-CH corpus).

Etymologically derived, 固 border. Its radical form 囗 (enclosure) appears in many related characters such as 四 (sì, four), 回 (huí, to circle), 国 (guó, country).

Spoken pronunciation

Definitions

  1. hard
  2. strong
  3. solid

Etymology & Origin

固

pictophoneticborder

Decomposition: ⿴囗古 (layout: full-surround)

Stroke Order

1
2
3
4
5
6
7
8

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

Words & Compounds

HSK Vocabulary with 固

WordPinyinMeaningHSK
固定verbgù dìngto fix5
坚固adjectivejiān gùfirm6
巩固adjective/verbgǒng gùto consolidate6
固体noungù tǐsolid6

Common Compounds

WordPinyinMeaning
固执adjectivegù zhíobstinate
顽固adjectivewán gùstubborn
类固醇nounlèi gù chúnsteroid
牢固adjectiveláo gùfirm
凝固verbníng gùto freeze
加固verbjiā gùto reinforce (a structure)
胆固醇noundǎn gù chúncholesterol
稳固adjectivewěn gùstable
老顽固lǎo wán gù(derog.) old-fashioned and stubborn person
固执己见phrasegù zhí jǐ jiànto persist in one's views
固然adverbgù ránadmittedly (it's true that...)
固有adjectivegù yǒuintrinsic to sth
根深蒂固phrasegēn shēn dì gùdeep-rooted (problem etc)
固若金汤phrasegù ruò jīn tāng(lit.) secure as a city protected by a wall of metal and a moat of boiling water (idiom)
固态noungù tàisolid state (physics)
83
Total compounds
49
As first character
23
As last character
28
As middle character

固 appears in 83 compound words: 49 as the first character, 23 as the last, and 28 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 固 in natural Chinese text, ranked by NPMI (Normalized Pointwise Mutual Information) — a statistical measure of association strength.

巩gǒng
0.7237,739 co-occurrences
定dìng
0.59976,544 co-occurrences
醇chún
0.5584,185 co-occurrences
顽wán
0.5181,307 co-occurrences
牢láo
0.5122,234 co-occurrences
凝níng
0.4922,950 co-occurrences
坚jiān
0.4903,638 co-occurrences
胆dǎn
0.435837 co-occurrences
体tǐ
0.42911,376 co-occurrences
守shǒu
0.4065,284 co-occurrences

Idioms & Chengyu (10)

本固枝荣běngùzhīróngHSK 6+

only when the foundation is consolidated can the parts develop

phrase
根深蒂固gēnshēndìgùHSK 7+

deep-rooted; ineradicable; ingrained; inveterate; radicated

phrase
固定词组gù dìng cí zǔHSK 5+

set phrase

phrase
固定收入gù dìng shōu rùHSK 5+

fixed income

phrase
固定资产gùdìng zīchǎnHSK 5+

fixed asset

noun
固若金汤gùruòjīntāngHSK 7+

strongly fortified; impregnable

phrase
固执己见gùzhíjǐjiànHSK 5+

to stick stubbornly to one's own views

phrase
深闭固拒shēn bì gù jùHSK 5+

deep, closed and refusing (idiom); obstinate; stubborn and perverse

phrase
泰卢固语Tàilúgùyǔ

Telugu

择善固执zéshàngùzhíHSK 5+

to insist on the righteous cause

phrase

Example Sentences

AI-Generated

固字虽然难写,但意思很有趣。

gù zì suī rán nán xiě , dàn yì sī hěn yǒu qù .

The character "固" may be difficult to write, but its meaning is quite interesting.

Vietnam+Feb 2026

...书记:在新的发展阶段增强“物质内力”与巩固“精神内力”

. . . shū jì : zài xīn de fā zhǎn jiē duàn zēng qiáng wù zhì nèi lì yǔ gǒng gù jīng shén nèi lì

... Secretary: Enhance "material internal force" and consolidate "spiritual internal force" in the new development stage

UdnnewsindexFeb 2026

民调前夕 江启臣固桩本命区 杨琼璎端政绩

mín diào qián xī jiāng qǐ chén gù zhuāng běn mìng qū yáng 琼 璎 duān zhèng jì

On the eve of the polls, Jiang Qichen solidified the pile of the natal district Yang Qiongying's political achievements

UdnnewsindexFeb 2026

嘉义选情黄家班两样情 嘉市根基稳固、嘉县陷重整纷争

jiā yì xuǎn qíng huáng jiā bān liǎng yàng qíng jiā shì gēn jī wěn gù , jiā xiàn xiàn chóng zhěng fēn zhēng

Chiayi election situation Huang Jiaban two loves Jia City has a solid foundation, and Jia County is trapped in a reorganization dispute

UdnnewsindexFeb 2026

敏感时刻...习近平致电金正恩 巩固中朝关系

mǐn gǎn shí kè . . . xí jìn píng zhì diàn jīn zhèng ēn gǒng gù zhōng cháo guān xì

Sensitive moments... Xi Jinping called Kim Jong-un to consolidate China-North Korea relations

UdnnewsindexFeb 2026

敏感时刻 习致电金正恩 巩固中朝关系

mǐn gǎn shí kè xí zhì diàn jīn zhèng ēn gǒng gù zhōng cháo guān xì

Sensitive moment Xi called Kim Jong-un to consolidate China-North Korea relations

Tatoeba

绳子不够牢固,撑不住他。

Shéngzi bù gòu láogù, chēng bù zhù tā.

The rope wasn't strong enough to support him.

Tatoeba

这个梯子是否足够坚固以承受我的重量?

Zhège tīzi shìfǒu zúgòu jiāngù yǐ chéngshòu wǒ de zhòngliàng?

Is this ladder strong enough to bear my weight?

Tatoeba

汤姆挺固执的不是吗?

Tāng mǔ tǐng gùzhi de bù shì ma?

Tom is being quite obstinate, isn't he?

Tatoeba

水结冰后成为固体。

Shuǐ jiébīng hòu chéngwéi gùtǐ.

Water becomes solid when it freezes.

Character Family

Semantic Family — Characters sharing the 囗 (border) component

囗 Radical Family — Characters sharing the enclosure radical

Homophones — Characters pronounced gù

Frequently Asked Questions

What does 固 (gù) mean in Chinese?
固 (gù) primarily means "hard." It is classified as HSK Level 5, making it an advanced character. It ranks #893 in character frequency.
What's the difference between 固 and 软?
固 (gù) and 软 (ruǎn) are often confused. antonym. The key distinguishing feature: 固 (hard) vs 软 (soft).
How many strokes does 固 have?
固 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 固?
The radical associated with 固 is 囗 (enclosure). This radical appears in many characters related to enclosure.
What are the components of 固?
固 is composed of: 囗 (semantic), 古 (phonetic). Its IDS decomposition is ⿴囗古 with a full-surround layout. Understanding the components helps with both memorization and recognizing related characters.
What are common words containing 固?
Common words with 固 include: 固定 (gù dìng, "to fix"); 固执 (gù zhí, "obstinate"); 顽固 (wán gù, "stubborn"); 类固醇 (lèi gù chún, "steroid"); 坚固 (jiān gù, "firm"). There are over 83 compound words containing this character.
What characters sound the same as 固 (gù)?
Several characters share the pronunciation gù: 故 (happening), 估 (to estimate), 古 (ancient), 股 (thigh). Context and tones help distinguish between them in speech and writing.
Is 固 the same in simplified and traditional Chinese?
Yes, 固 is written the same way in both simplified and traditional Chinese.

Practice writing 固 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.