残のこり湯ゆ

noun

used bathwater; leftover bathwater

Refers to bathwater remaining in the tub after someone has bathed. Often used in contexts like reusing water for laundry or describing water that has cooled.

• 残のこり湯ゆで洗せん濯たくすると節せっ水すいになる。

  Doing laundry with leftover bathwater saves water.

• 朝あさになると残のこり湯ゆはすっかり冷さめていた。

  By morning, the leftover bathwater had gone completely cold.