noun which may take the genitive case particle 'no'
childless; child-free
Describes a person or couple without children. 子なし is neutral; 子無し can carry a slightly more formal or literary tone. The term can be used in both descriptive and self-identifying contexts.
子なし夫婦が増えている。
The number of childless couples is increasing.
彼女は子なしの人生を選んだ。
She chose a child-free life.
A more literal phrase meaning 'there are no children'; 子なし is a compact noun-modifying form.
An acronym for 'Double Income, No Kids'; refers specifically to a childless couple with dual incomes, while 子なし is broader.
Compound of 子 (child) and なし (without). The kanji spelling 子無し uses the character 無 for 'without', while 子なし is a mixed kana-kanji form.