The term 'Vile Vapor' can be summarized as a 6-letter word, 'MIASMA'. MIASMA is a term used to describe a noxious, unpleasant, or unhealthy smell or vapor. It is often associated with stagnant air, decaying organic matter, and other sources of pollution. In the past, it was believed that MIASMA was responsible for the spread of diseases such as cholera and malaria. Today, it is still used to describe a variety of unpleasant odors.