終しゅう夜や

noun, adverb

all night; throughout the night

Used as a noun or adverb to describe something lasting the entire night. Often appears in formal or written contexts.

• 終しゅう夜や、雨あめが降ふり続つづいた。

  It rained all night.

• 彼かれは終しゅう夜や、仕し事ごとをしていた。

  He worked throughout the night.