yī​jué​bù​zhèn

collapse

一蹶不振 yī​jué​bù​zhèn
collapse idiom
to suffer a setback leading to total collapse or permanent failure; unable to recover after a single stumble

He has been disheartened ever since that business failure.

Frequency

Movie subtitles
1.16 per million appears in 1% of films
Written text
1.02 per million

Sources

Definitions
CC-CEDICT