Antonyms for the word "antiseptize" would include words that express the opposite of cleansing, disinfecting, or purifying. For instance, words like "infest," "dirty," "corrupt," "defile," "spoil," "pollute," and "taint" could all be considered antonyms for "antiseptize." These words indicate the presence of harmful or unwanted elements within a particular space or object, rather than the absence of them. They convey a lack of hygiene, sanitation, or purity, and imply the potential for disease, infection, or contamination. Thus, understanding the antonyms of "antiseptize" can help to clarify and emphasize the importance of proper cleaning and decontamination practices.