水みず入いらずで

expression

privately; just family/close ones; with no outsiders

Used when a group, especially family or close friends, spends time together without any outsiders present. Often implies a cozy, intimate atmosphere.

• 今こん夜やは家か族ぞく水みず入いらずで食しょく事じを楽たのしんだ。

  Tonight we enjoyed a meal with just the family.

• 久ひさしぶりに親おや子こ水みず入いらずで温おん泉せんに行いった。

  We went to a hot spring, just parent and child, for the first time in a while.