雲うん集しゅう霧む散さん

noun, noun or participle which takes 'suru'

gathering like clouds and vanishing like mist; swarming and scattering

A yojijukugo describing many things or people gathering in large numbers and then dispersing just as quickly. Often used in literary or formal contexts to evoke a fleeting, ephemeral assembly.

• 観かん客きゃくは雲うん集しゅう霧む散さんし、会かい場じょうは静しずかになった。

  The audience gathered like clouds and vanished like mist, and the venue fell silent.

• 戦せん場じょうでは兵へい士したちが雲うん集しゅう霧む散さんを繰くり返かえした。

  On the battlefield, soldiers repeatedly swarmed and scattered.