究 (jiū): research

究 (jiū) is a Chinese character meaning “research.” Classified as HSK Level 4 (HSK 3.0 Standard, CLEC 2022), it is composed of 穴 (semantic) and 九 (phonetic). It ranks #429 in character frequency (SUBTLEX-CH corpus).

Etymologically derived, 究 cave. Its radical form 穴 (cave) appears in many related characters such as 穿 (chuān, to wear, 穿透), 空 (kōng, empty, sky), 突 (tū, sudden).

Spoken pronunciation

Definitions

  1. research

Etymology & Origin

究

pictophoneticcave

Decomposition: ⿱穴九 (layout: top-bottom)

Stroke Order

1
2
3
4
5
6
7

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

Words & Compounds

HSK Vocabulary with 究

WordPinyinMeaningHSK
研究verbyán jiūresearch4
究竟adverb/nounjiū jìngto go to the bottom of a matter4
研究生nounyán jiū shēnggraduate student4
追究verbzhuī jiūto investigate6
讲究verb/adjectivejiǎng jiuto pay particular attention to5

Common Compounds

WordPinyinMeaning
终究adverbzhōng jiūin the end
研究所nounyán jiū suǒresearch institute
探究verbtàn jiūto investigate
研究员nounyán jiū yuánresearcher
深究verbshēn jiūto perform an in-depth investigation
研究院nounyán jiū yuànresearch institute
研究者nounyán jiū zhěinvestigator
学究nounxué jiūpedant
考究verbkǎo jiūto investigate
查究verbchá jiūto follow up a study
日本原子能研究所rì běn yuán zǐ néng yán jiū suǒJapan Atomic Energy Research Institute
经不起推究jīng bù qǐ tuī jiūdoes not bear examination
中美文化研究中心zhōng měi wén huà yán jiū zhōng xīnthe Hopkins-Nanjing Center, located in Nanjing, est. 1986 (formally, the Johns Hopkins University – Nanjing Universit...
发展研究中心fā zhǎn yán jiū zhōng xīnDevelopment Research Center (PRC State Council institution)
神学研究所shén xué yán jiū suǒseminary
44
Total compounds
7
As first character
36
As last character
57
As middle character

究 appears in 44 compound words: 7 as the first character, 36 as the last, and 57 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 究 in natural Chinese text, ranked by NPMI (Normalized Pointwise Mutual Information) — a statistical measure of association strength.

研yán
0.9501,072,645 co-occurrences
组zǔ
0.693228,908 co-occurrences
星xīng
0.612226,124 co-occurrences
小xiǎo
0.568228,628 co-occurrences
行xíng
0.533242,110 co-occurrences
所suǒ
0.513132,474 co-occurrences
竟jìng
0.4779,173 co-occurrences
院yuàn
0.43850,814 co-occurrences
学xué
0.41958,994 co-occurrences
硕shuò
0.4123,340 co-occurrences

Idioms & Chengyu (3)

归根究底guīgēnjiūdǐHSK 6+

ultimately it comes down to

phrase
一探究竟yītànjiūjìngHSK 6+

to check something out; to investigate

verb
追根究底zhuīgēnjiūdǐHSK 5+

to get to the bottom of the matter; to make a thorough inquiry into something

phrase

Example Sentences

AI-Generated

这个问题需要深入研究,才能找到根本原因。

Zhè gè wèntí xūyào shēnrù yánjiū, cáinéng zhǎodào gēnběn yuányīn.

This issue needs in-depth research to find the root cause.

99 健康网Feb 2026

...天 老人吃进ICU!“冰箱杀手”李斯特菌究竟为何?

. . . tiān lǎo rén chī jìn I C U ! bīng xiāng shā shǒu lǐ sī tè jūn jiū jìng wéi hé ?

... The old man was taken to the ICU!" Refrigerator killer "What is listeria bacteria?

Yahoo FinanceFeb 2026

总理李强:研究推进银发经济和养老服务发展有关工作

zǒng lǐ lǐ qiáng : yán jiū tuī jìn yín fā jīng jì hé yǎng lǎo fú wù fā zhǎn yǒu guān gōng zuò

Premier Li Qiang: Study and promote the development of the silver economy and elderly care services

The Portugal NewsFeb 2026

国家妇女研究所阿尔加维代表团的解散被认为是不负责任的...

guó jiā fù nǚ yán jiū suǒ ā ěr jiā wéi dài biǎo tuán de jiě sàn bèi rèn wéi shì bù fù zé rèn de . . .

The dissolution of the Algarve delegation of the National Institute for Women was considered irresponsible...

It之家Feb 2026

研究表明:监管缺失的商业航天活动正成为大气污...

yán jiū biǎo míng : jiān guǎn quē shī de shāng yè háng tiān huó dòng zhèng chéng wéi dà qì wū . . .

Research shows that commercial space activities without regulation are becoming air pollution...

百度新闻Feb 2026

马年话马丨龙马精神的“龙马”究竟是什么?

mǎ nián huà mǎ 丨 lóng mǎ jīng shén de lóng mǎ jiū jìng shì shén má ?

The year of the horse talk about the horse丨the dragon horse spirit of the "dragon horse" what exactly is it?

Tatoeba

苏联学家研究什么呢?

Sūlián xué jiā yánjiū shénme ne?

What does a Sovietologist study?

Tatoeba

汤姆究竟在做什么?

Tāngmǔ jiūjìng zài zuò shénme?

What exactly does Tom do?

Tatoeba

他不是罗马大学的研究生吗?

Tā bù shì Luómǎ dàxué de yánjiūshēng ma?

Isn't he a graduate student at the University of Rome?

Tatoeba

他们从事癌症研究工作。

Tāmen cóngshì áizhèng yánjiū gōngzuò.

They are engaged in cancer research.

Character Family

Semantic Family — Characters sharing the 穴 (cave) component

Homophones — Characters pronounced jiū

Frequently Asked Questions

What does 究 (jiū) mean in Chinese?
究 (jiū) primarily means "research." It is classified as HSK Level 4, making it an upper-intermediate character. It ranks #429 in character frequency.
What's the difference between 究 and 仇?
究 (jiū) and 仇 (chóu) are often confused. confusable. The key distinguishing feature: 穴 vs 亻 (same 九 component).
How many strokes does 究 have?
究 is written with 7 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 究?
The radical associated with 究 is 穴 (cave). This radical appears in many characters related to cave.
What are the components of 究?
究 is composed of: 穴 (semantic), 九 (phonetic). Its IDS decomposition is ⿱穴九 with a top-bottom layout. Understanding the components helps with both memorization and recognizing related characters.
What are common words containing 究?
Common words with 究 include: 研究 (yán jiū, "research"); 究竟 (jiū jìng, "to go to the bottom of a matter"); 终究 (zhōng jiū, "in the end"); 研究生 (yán jiū shēng, "graduate student"); 追究 (zhuī jiū, "to investigate"). There are over 44 compound words containing this character.
What characters sound the same as 究 (jiū)?
Several characters share the pronunciation jiū: 就 ((after a suppositional clause) in that case), 久 ((of a period of time) long), 九 (nine), 酒 (alcohol), and 2 more. Context and tones help distinguish between them in speech and writing.
Is 究 the same in simplified and traditional Chinese?
Yes, 究 is written the same way in both simplified and traditional Chinese.

Practice writing 究 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.