Absterge, a verb that means to clean or remove impurities or dirt, has multiple antonyms that connote the opposite meaning or action. To defile is the first antonym of absterge, which implies to make something dirty, pollute, or contaminate. To taint represents another antonym for absterge, indicating to infect or corrupt something. Sully can also be used as an antonym for absterge, meaning to make something impure or tarnished. Besmirch is another antonym, suggesting the act of staining, smearing, or defaming something. Lastly, fouling, blemishing, and contaminating can be employed as additional antonyms for absterge, all pointing to the act of making something filthy or unclean.