究 (jiū) — bound morpheme meaning 'to investigate, to stud…

Definition

究 is a bound morpheme: in 研究 and 追究 it means 'to investigate / get to the bottom of'; in 究竟 it shifts to a written 'after all, actually' meaning. It never stands alone — always attach it to another character.

bound form

bound morpheme meaning 'to investigate, to study' (used in 研究, 追究, etc.)bound morpheme meaning 'after all, actually' (used in 究竟)

Examples

。
Wǒ huì zǐ xì yán jiū zhè ge wèn tí.
I will carefully study this problem.
？
jiū Jìng fā shēng le shén me?
What actually happened?
。
Zhè jiàn shì bì xū zhuī jiū dào dǐ.
This matter must be thoroughly investigated.