dàn​wàng

fade from memory

淡忘 dàn​wàng
fade from memory verb
to gradually forget as time passes; to have something fade from one's memory

I have gradually forgotten my old classmate's name because it has been so long since we last met.

Frequency

Movie subtitles
1.13 per million appears in 1% of films
Written text
2.98 per million

Sources

Definitions
CC-CEDICT