独身 (dú shēn): незамужней

I'm forty this year and still unmarried. Although my parents are anxious, they no longer urge me to get married.

She enjoys the single life; on weekends she can arrange things freely without considering a partner's opinion.

He decided to remain unmarried for life and devoted all his energy to scientific research.

In traditional thinking, unmarried people are often asked by relatives why they haven't settled down yet.

After her divorce, she chose to stay single, spending her time traveling and reading, and she lives a fulfilling life.