深层 | shēn céng | deep layer / deep / deep-seated / underlying | |
深层次 | shēn céng cì | deep level / deep-seated / in-depth | |
顽疾 | wán jí | ineradicable disease / fig. deep-seated problem / perennial problem | |
刻骨相思 | kè gǔ xiāng sī | deep-seated lovesickness (idiom) | |
饮恨吞声 | yǐn hèn tūn shēng | to harbor a grudge with deep-seated hatred (idiom) |