ぬるめる

ichidan verb, transitive verb

cool down; make lukewarm

Used for cooling hot water, typically by adding cold water or letting it stand, to make it lukewarm. Often used in cooking or bathing contexts.

• 熱あついお茶ちゃをぬるめるために、水みずを少すこし足たした。

  I added a little water to cool down the hot tea.

• 風ふ呂ろの湯ゆが熱あつすぎたので、ぬるめて入はいった。

  The bathwater was too hot, so I cooled it down before getting in.