Antonyms for the word "more purulent" include cleaner, healthier, purer, and more sterile. These words convey the opposite meaning of infected, contaminated, or tainted. A clean wound, for example, is free of purulent discharge and appears to be healing properly. A healthier body is free of infections and diseases that may cause purulent discharge or substance. A purer substance is free of any impurities or contaminants that may alter its composition. And a sterile environment is completely free of any living organisms, including bacteria, viruses, and fungi, that may cause infections or produce purulent discharge.