The antonym for the term "becoming contaminated" is "becoming purified." Contamination is defined as the presence of unwanted or harmful substances in a particular environment, whereas purification means the process of removing those contaminants to make it pure or clean. Contamination can cause harm to humans, animals, and the environment, but purification can enhance their quality of life. It is essential to maintain the purity of water, air, and food to ensure a healthy and safe living environment. By adopting sustainable practices and taking preventative measures against pollution, we can create a cleaner, safer world for ourselves and future generations.