Sex discrimination, also known as gender discrimination, refers to the prejudice or unfair treatment based on a person's sex or gender. The term has an unfortunate history, and there are numerous ways to refer to this phenomenon more politely. Some of the synonyms include gender bias, sex bias, gender-based discrimination, and sexual discrimination. Additionally, phrases such as gender inequality, unequal treatment based on sex, or simply discrimination based on sex can be used. It's important to be mindful of using inclusive language that recognizes and respects all genders, and to prioritize creating environments that are free from discriminatory behavior.