kè​gǔ

deeply engraved

刻骨 kè​gǔ
deeply engraved
deeply felt and unforgettable; ingrained or deep-rooted like something carved into the bones
to wrack one's brains
(literary) to use one's mental energy to the utmost, especially when searching for the right words in poetry or writing
cruel
(literary) describes laws or punishments that are harsh and cruel

Frequency

Written text
1.18 per million

Sources

Frequency data
BCC Corpus (BLCU)