yī​jué​bù​zhèn

to collapse after a setback

Senses

一蹶不振 yī​jué​bù​zhèn (also yì​jué​bú​zhèn) to collapse after a setback

Literally "one stumble, unable to rise"; used as an idiom to describe being unable to recover or pull oneself together after a single failure or defeat.

References

antonym 东山再起/東山再起 一蹶不振/一蹶不振
antonym 再接再厉/再接再厲 一蹶不振/一蹶不振