"Spinster" itself is a feminine term. It historically referred to a woman who was unmarried and, often, responsible for spinning wool. While the term is outdated and can be considered offensive, it was originally used to describe a woman's occupation and marital status.
Today, it's generally considered inappropriate to use the term "spinster" as it carries negative connotations.
If you're looking for a respectful and modern way to describe an unmarried woman, you can use phrases like:
* Unmarried woman
* Single woman
* Woman who is not married
It's important to use respectful and inclusive language when referring to individuals.