shēn​céng​cì

deep-seated

深层次 (深層次) shēn​céng​cì
deep-seated adjective
pertaining to underlying or fundamental levels, often regarding structural problems or issues

The reform is facing some deep-seated structural issues.

in-depth adjective
thorough and detailed in scope or analysis

Experts conducted an in-depth analysis of the phenomenon.

Frequency

Written text
5.14 per million

Sources

Definitions
CC-CEDICT
Frequency data
BCC Corpus (BLCU)