Rechercher
all at once
01
in a sudden or unexpected manner
02
all at the same time
Exemple
The rain started all at once, catching everyone off guard.
The lights went out all at once, leaving the room in darkness.
She felt overwhelmed all at once by the news.
All at once, the crowd began cheering as the band took the stage.
All at once, the traffic began moving, ending the long wait.
