Elutriated, meaning to cleanse or purify by washing away impurities, has a few antonyms that could convey the opposite meanings. One antonym could be "contaminated," which means to pollute or make impure. Another antonym could be "soiled," which means to be stained, dirty or unclean. Similarly, "polluted" means to contaminate with harmful substances, and "tainted" means to spoil or corrupt something. In contrast to elutriated, these antonyms convey the opposite meanings of leaving something dirty, impure or contaminated. It's essential to understand these antonyms to grasp the contextual meaning of the word elutriated when reading or writing.