Even-Stevens is an idiom that describes a situation where two parties are equal, and no one has an advantage over the other. However, some antonyms of the word include uneven, unbalanced, one-sided, partial, unequal, and biased. These antonyms are used to describe situations where a party has an advantage over another, creating an unfair or partial situation. In a business deal, for example, one party can have an uneven advantage over the other in terms of resources and information. In a competitive game or sport, one team can have an unfair advantage over the other by stacking the odds in their favor. Therefore, it's essential to recognize and avoid such situations by being fair and impartial.