Radiant (adjective)

1. Emitting light or heat.
2. Bright, shining, or sparkling.
3. Having or showing great happiness, love, or health.

Origin:

The word "radiant" is derived from the latin word "radiare" which means "to shine". it was used to describe something that emits light or heat, and later it was used to describe something that is bright, shining, or sparkling.

Examples:

1. The sun was radiant in the sky.
2. The radiant heat from the fireplace was warming the room.
3. She had a radiant smile on her face.
4. The diamond was radiant with its many facets.
5. He was radiant with health and energy.