Antonyms for the word "most nondiscriminatory" include words such as prejudiced, biased, discriminatory, partial, and unfair. These words signify a preference or favoritism towards certain individuals or groups, rather than treating everyone equally. When one is prejudiced, they hold preconceived notions about others based on their race, gender, religion, or other factors, rather than treating them fairly. Similarly, those who are biased tend to favor one side over the other, sometimes without justification. Discrimination or partiality towards a specific group is a harmful practice that can result in social and economic inequalities. Therefore, it is essential to strive towards being non-discriminatory and treating everyone equally.