Befoulment, which refers to the act of polluting or contaminating, has several antonyms that connote cleanliness, purity, and freshness. These antonyms include purification, clarification, refinement, and decontamination. Purification refers to the process of removing impurities or unwanted elements, while clarification entails making something clear and easy to understand or see. Refinement implies the act of improving something by removing impurities, whereas decontamination is the process of removing harmful or toxic substances from a surface or environment. Other antonyms for befoulment include cleansing, sanitization, and sterilization. All these words express the opposite of befoulment, promoting cleanliness and maintaining hygiene.