Axiological refers to the study of values and ethics. Its antonyms, on the other hand, pertain to the absence or the opposite of these values. The first antonym that comes to mind is amoral, which describes an action or behavior without regard for ethical principles. The second antonym is immoral, which means behavior that is contrary to moral standards. The opposite of axiological can also be non-ethical, indicating the absence of morality, principles, or values. Lastly, we have unethical, which pertains to behavior that violates ethical principles. Overall, these antonyms are important to understanding axiological principles and practices by showing their opposites.