What feminine is master?

The feminine form of "master" is "mistress." Historically, "mistress" referred to a woman who had control or authority over something, similar to how "master" is used for men. However, the term has evolved and can also carry different connotations, sometimes implying a woman in a position of power or influence. In contemporary usage, "mistress" can also refer to a woman involved in a romantic relationship, often outside of marriage.