| 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 | stubborn illness / chronic disease / fig. deep-seated problem / systemic issue | ![]() |
| 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) | ![]() |
