一 旦(いったん)

いったん

adverb

once, for a moment, temporarily

See also: 一端(いったん) (one end, a part (一端))

1. once, when once

Used to indicate that once something happens, a consequence follows.

Once I've decided, I see it through to the end.

Once it catches fire, it's hard to put out.

You should keep a promise once you've made it.

2. for the time being, temporarily

For a short period before continuing or changing.

Let's take a break for now.

I'll go home first and then come back.

USAGE: 一旦(いったん) has two main uses:

1. CONDITIONAL (once...): Often followed by と or ば

2. TEMPORARY (for now): Indicates a pause before continuing

COMMON PATTERNS:

general

Added 2026.1.13 21:42 · Revised 2026.5.30 1:31

04000/04099_ittan