The term 'EVANESCE' is an 8-letter word that means to disappear like vapor. It is derived from the Latin verb 'evanescere, ' which means to vanish away. The term is often used to describe something that fades away quickly or gradually, such as a dream, a memory, or a feeling. It can also be used to describe a physical object that disappears suddenly, such as a cloud of smoke or a puff of air. In essence, it is a way of describing something that is fleeting and transient.