The phrase "be advantage" refers to a state of having a favorable or beneficial situation. The opposite of this idea is to be disadvantaged or to have a disadvantage. When someone is disadvantaged, they have a situation that is less favorable than others. This might mean they have fewer resources, less access to opportunities, or face obstacles that others do not. Other antonyms for "be advantage" might include phrases like "be at a disadvantage," "be disadvantaged," or "be disfavored." These phrases all imply a situation that is less than optimal, whereas "be advantage" implies a positive situation.