いっぺんに
Meanings
1
all at once; in one go; at the same time
usually written using kana alone
Describes doing multiple things simultaneously or completing something in a single action, without interruption.
I finished all my homework at once.
I can't handle it when you tell me so many things at the same time.
2
usually written using kana alone
Emphasizes immediacy or suddenness, often with a nuance of something happening unexpectedly fast.
His expression changed in an instant.
Usage patterns
- 〈事〉を一遍に済ませるto get several things done all at once
I finished the shopping and errands all in one go.
- 〈物〉が一遍になくなるfor something to disappear all at once/suddenly
My savings disappeared all at once.
- 〈事〉が一遍に押し寄せるfor troubles or tasks to come rushing in all at once
Work and housework all came rushing in at once.