究

jiū

after all

to investigate; to study carefully; Taiwan pr. [jiu4]

cave (穴) + sound jiū (九) = dig in to investigate

穴 is the cave or hole that anchors the meaning — you dig into a cavity to investigate and reach the bottom of something. 九 lends the sound jiū and does not carry semantic weight here.

穴+九→究
九NinePhonetic
穴CaveSemantic

这件事究竟是谁做的?

zhè jiàn shì jiū jìng shì shuí zuò de ?

who on earth did this thing after all?

我们需要深入研究究竟是什么原因造成了这个问题。

wǒ men xū yào shēn rù yán jiū jiū jìng shì shén me yuán yīn zào chéng le zhè ge wèn tí 。

we need to investigate carefully what reason after all caused this problem.

Words with 究

中央研究院

zhōng yāng yán jiū yuàn

Academia Sinica, research institution headquartered in Taipei

科学研究

kē xué yán jiū

scientific research

研究生

yán jiū shēng

graduate student

考究

kǎo jiū

to investigate

追根究底

zhuī gēn jiū dǐ

to get to the heart of the matter

探究

tàn jiū

to investigate

研究

yán jiū

research

一探究竟

yī tàn jiū jìng

to check out

中美文化研究中心

zhōng měi wén huà yán jiū zhōng xīn

the Hopkins-Nanjing Center, located in Nanjing, est. 1986 (formally, the Johns Hopkins University – Nanjing University Center for Chinese and American Studies)

古根罕喷气推进研究中心

gǔ gēn hǎn pēn qì tuī jìn yán jiū zhōng xīn

Guggenheim Aeronautical Laboratory at the California Institute of Technology (GALCIT, from 1926)

可行性研究

kě xíng xìng yán jiū

feasibility study

国际肿瘤研究机构

guó jì zhǒng liú yán jiū jī gòu

International Agency for Research on Cancer (IARC)

More characters with 穴

屄穿窥帘穷窕