radiant

This word evokes a sense of outward expansion, where a source of energy or emotion is so intense that it spills over into the surrounding environment. It is far more powerful than simply being bright or happy, suggesting a glow that is almost tangible and infectious to others.

In social contexts, it is almost exclusively positive and is frequently used to describe people during peak moments of happiness or vitality. While a person can be bright or cheerful, being radiant implies a deep, luminous quality that suggests an internal state of perfection or bliss.