Antonyms for the word "most condonable" are words that describe actions or behaviors that are not acceptable, justifiable or pardonable. Some possible antonyms can include "blameworthy, reprehensible, inexcusable, unforgivable, indefensible or unjustifiable". These words suggest actions or behaviors that go against social norms, values, or ethical principles. For instance, stealing, cheating, lying, harassing, or discriminating against others are actions that are generally regarded as the antithesis of condonable or acceptable behaviors. Therefore, when we use an antonym for "most condonable," we highlight the negative attributes of a particular action or behavior and indicate that it should be avoided or condemned.