yí​shū

testament

遗书 (遺書) yí​shū
testament noun
a letter or document written before death, such as a will or suicide note

The police found a short suicide note on the deceased person's desk.

ancient literature noun
historical books or documents passed down from ancient times

Experts are studying these ancient manuscripts unearthed from the tomb.

posthumous writing noun
literary works or manuscripts left behind by a deceased person

These essays and poem drafts are posthumous works left by that famous writer.

Frequency

Movie subtitles
3.34 per million appears in 1% of films
Written text
2.93 per million

Sources

Definitions
CC-CEDICT