Ex-purgation refers to the act of removing or cleansing something undesirable. The opposite of ex-purgation is contamination, which means to pollute or infect something with an undesirable substance or element. Another antonym for ex-purgation is defilement, which means a degradation of something's purity or appropriateness. Opposite to ex-purgation, defilement can be achieved by action, emotion, or thought. While ex-purgation aims to eliminate the unwanted traits of an entity, corruption seeks to introduce it. In essence, contamination and defilement are the complete opposite of ex-purgation, and they represent the antonyms that embody the worst outcomes.