empty nest
Refers to the stage in life when children have left home, leaving parents alone. Often used in contexts discussing family dynamics or psychology.
エンプティーネストを迎えた夫婦は、新しい趣味を始めた。
The couple facing an empty nest started a new hobby.
Variant with interpunct; less common but seen in some contexts.
Loanword from English 'empty nest', referring to the household after children have grown and left.