The word "vindicable" means justifiable or defensible. Therefore, antonyms for "more vindicable" would be words that convey the opposite meaning, such as unjustifiable, indefensible, or inexcusable. These words suggest that something cannot be justified, be it an action, a decision, or a belief. For instance, an unjustifiable act may be morally wrong, whereas an indefensible decision may lack a reasonable explanation or argument. Using antonyms for "more vindicable" can help to express a dissenting opinion or show disagreement with someone's actions or beliefs.