The word "contamination" refers to the act of making something impure or unclean by introducing harmful substances or elements.
Antonyms of "contamination" could include "purification" and "sterilization".
"Purification" involves removing impurities and making something pure. When we purify water, for example, we remove contaminants such as dirt, chemicals, and bacteria to make it safe for drinking. In contrast to contamination, which adds unwanted substances, purification aims to get rid of them.
"Sterilization" is the process of destroying all forms of life, including bacteria, viruses, and fungi. This is often done to medical instruments or food packaging to prevent contamination. While contamination brings in harmful organisms, sterilization eliminates them completely, ensuring a clean and safe environment.
In conclusion, while contamination makes things impure and unclean, purification and sterilization work towards making them pure and free from harmful elements.