一旦
Meanings
Indicates doing something as a temporary measure or a single action before a later change; often used with ~したら or ~してから.
I'll go home once and then go out again.
Once you've decided something, see it through to the end.
for a short time; briefly; temporarily
Describes a temporary state or pause; often used with verbs like 止める, 中断する, or 落ち着く.
The rain got heavier, so we temporarily stopped work.
Let's calm down for a moment and check the situation.
one morning
Archaic noun meaning 'one morning'; not used in modern Japanese outside of classical texts.
In classical Japanese, 一旦 can be used to mean 'one morning'.
Usage patterns
- 一旦〈動詞〉たらonce you (do something), ...
Once you decide, you should see it through to the end.
- 一旦立ち止まるto pause for a moment
He paused for a moment to reconsider.
- 一旦〈場所〉に戻るto go back to a place for a moment
I'll go back home for a bit and then start over.
- 一旦中断するto suspend/interrupt something temporarily
We decided to temporarily suspend the meeting.
Expressions
- 一旦緩急in case of emergency; should danger arise
- 問うは一旦の恥、問わぬは末代の恥better to ask and be embarrassed than not ask and never know