That certain something is a quality that can be difficult to define, but it is often associated with charisma and charm. OOMPH is a term used to describe a person's energy and enthusiasm, while AURA is an invisible force or quality that surrounds someone. ELAN is a French word meaning liveliness and enthusiasm, and ALLURE is the power of attraction or charm. Finally, MYSTIQUE is a mysterious quality that makes someone attractive and intriguing.