chén​fēng

long-forgotten

尘封 (塵封) chén​fēng
long-forgotten verb
kept unused, stored away, or hidden for a long time
dusty verb
covered in a layer of dust from being left undisturbed

Frequency

Movie subtitles
0.660 per million appears in 0% of films
Written text
1.94 per million

Sources

Definitions
CC-CEDICT