一いっ昼ちゅう夜や

noun, adverb

whole day and night; 24 hours

Refers to a continuous period of one full day and night. Often used in contexts like travel, work, or duration.

• 一いっ昼ちゅう夜やかけて目もく的てき地ちに着ついた。

  It took a whole day and night to reach the destination.

• この作さ業ぎょうは一いっ昼ちゅう夜やでは終おわらない。

  This work cannot be finished in 24 hours.