Definition: The word "antipathogenic" in Greek refers to an entity that interferes with the function, effectiveness, or efficiency of a substance; thus, preventing it from being used effectively. A detailed definition: 1. Antipathy: A feeling of hostility or dislike toward something. This is often described as a lack of affection toward someone. 2. Pathogen (also spelled pathogen) - Any organism that can cause disease. 3. Infection (often shortened to infection): the spread and growth of an organism from one site to another, usually involving the body's cells or tissues. 4. Antibiotic: An effective medicine designed for the treatment of bacterial infections. This drug blocks or damages the bacteria' ability to reproduce and grow. 5. Antimicrobial agent: A substance that inhibits or interferes with the growth of a pathogen. It can be used against a wide variety of bacteria, viruses, fungi, and other microorganisms. 6. Antimunior (antimunior): An antiviral drug that prevents or reduces viral infections such as those caused by the influenza virus. In essence, antipathogenic refers to substances that either prevent or inhibit the effectiveness, growth, or spread of a pathogen.