一昼夜(いっちゅうや)

いっちゅうや
noun
a whole day and night; twenty-four hours
formalwrittentime-period
1. a whole day and night; twenty-four hours; a full day
A period spanning one complete daytime and nighttime cycle. Emphasizes that something continued through both day and night without interruption.
一昼夜(いっちゅうや)かけて完成(かんせい)させた。
I spent a full day and night to complete it.
救助隊(きゅうじょたい)は一昼夜(いっちゅうや)休(やす)まず捜索(そうさく)を続(つづ)けた。
The rescue team continued searching without rest for a full day and night.
台風(たいふう)が過(す)ぎ去(さ)るまで一昼夜(いっちゅうや)にわたって激(はげ)しい雨(あめ)と風(かぜ)が続(つづ)いた。
Fierce rain and wind lasted for a full day and night until the typhoon passed.

Usage

一昼夜(いっちゅうや) is a somewhat literary or formal way of expressing a 24-hour period. Unlike 一日(いちにち), it emphasizes that the activity or event continued through both daytime and nighttime, making it more dramatic. It often appears in news reporting, historical accounts, and literary descriptions.

Common patterns

  • 一昼夜(いっちゅうや)かけて (spending a full day and night)
  • 一昼夜(いっちゅうや)にわたって (spanning a full day and night)
  • 一昼夜(いっちゅうや)休(やす)まず (without resting for a full day and night)

Similar words

  • 一昼夜(いっちゅうや): a day and night (emphasizes continuous day-night span)
  • 一日(いちにち): one day (neutral, standard)
  • 丸一日(まるいちにち): a whole day (emphasizes entirety)
  • 二十四時間(にじゅうよじかん): twenty-four hours (precise, numerical)

Related Words

Compare: 一日(いちにち) (one day)
general
Added 2026.3.4 14:55 · Revised 2026.9.2 13:01
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