The word 'luster' refers to a gentle sheen or soft glow, often associated with the surface of an object that reflects light. It can describe the brightness or radiance of materials, such as metals, gems, or even the surface of skin. In a broader sense, it can also represent a quality of brilliance or attractiveness that is more abstract, like the charm or appeal of a person or idea.
The word 'luster' comes from the Latin word 'lustrare,' which means 'to illuminate or brighten.' It evolved through Middle English from the Old French word 'lustre,' which also relates to light and brightness.