夜よも日ひも明あけない

expression

cannot live without; means the world to one

Fixed expression meaning someone or something is so important that one cannot bear even a moment without them. Often used in romantic or deeply affectionate contexts.

• 彼かの女じょは私わたしにとって夜よも日ひも明あけない存そん在ざいだ。

  She means the world to me; I can't live without her.

• この子こは私わたしにとって夜よも日ひも明あけないほど大たい切せつだ。

  This child is so precious to me that I can't imagine life without them.