"Anti" is a prefix derived from Greek, meaning "against" or "opposite." It is commonly used in various contexts, such as in the term antibiotic, which refers to substances that fight against bacterial infections. The prefix can also be found in words like antifreeze, which prevents freezing, and antagonist, a character or force that opposes the main character in a story. In a broader cultural context, "anti" can describe movements or attitudes that oppose certain ideas or practices. For example, the anti-war movement seeks to prevent or end conflicts, while anti-racism promotes equality and fights against racial discrimination. These movements aim to challenge and change societal norms and policies.