fade into obscurity

Translations
уйти в неизвестность
After the initial success, the band faded into obscurity.
После первоначального успеха группа ушла в неизвестность.
Definitions
To gradually become less visible, known, or relevant, often to the point of being forgotten or overlooked.
Words
fade

verb
исчезать
into

preposition
в
obscurity

noun
безвестность