索隐
suǒ​yǐn

to explore the obscure

索隐 索隱 suǒ​yǐn
to explore the obscure
To explore or expound upon deep, obscure, or hidden principles.
textual commentary
A style of textual commentary that seeks to explain difficult or hidden meanings in classic literature, exemplified by the Shiji Suoyin (Seeking the Obscure in the Records of the Grand Historian)

Frequency
Written text
0.525 per million

Sources
Frequency data
BCC Corpus (BLCU)