The antonyms for the word "un-fairest" would be "fair," "just," "impartial," "equitable," "unbiased," and "unprejudiced." When someone or something is "un-fairest," it suggests that it is partial or biased, and thus, it is essential to know its antonyms. In situations where equality is needed or when evaluating people or things, we use the antonyms to weigh the facts objectively, and everyone gets a fair chance without any bias. Therefore, it is pivotal to recognize the antonyms for "un-fairest" to use them appropriately in the right situations to achieve unbiased and fair decisions.