プログレッシブ和英中辞典(第4版)の解説
みずいらず【水入らず】
一家水入らずの集まりだった
It was strictly a family gathering [affair].
親子３人水入らずで暮らしたい
I want to live by ourselves, just the three of us, without outsiders in the house.
結婚記念日に彼らは夫婦水入らずで食事に行った
On their wedding anniversary, the couple went out to dine (all) by themselves.