Radiant

adj.joyful, energeticwarm

What it means

Visibly bright with happiness, health, or beauty.

Reach for it when describing someone whose positive feeling or vitality shows in their face

Nia looked radiant as she welcomed the graduates onto the stage.

everyday
beaming
when a broad smile reveals unmistakable happiness
not when It misses quiet beauty or good health without an obvious smile.
everyday
joyful
when the emotion itself matters more than how the person looks
not when It says nothing about brightness, beauty, or visible vitality.
warm
glowing
when warmth or healthy color is visibly present
not when Skip it when the praise is about lively joy rather than appearance; glowing centers what can be seen.
warm
sunny
for a habitually cheerful manner
not when A single beautiful or triumphant moment is too narrow for sunny, which suggests disposition.
professional
vibrant
when health, color, and energy are the important qualities
not when For serene elegance, vibrant brings too much active intensity.
formal
resplendent
when clothing or ceremonial appearance is magnificently bright
not when Inner contentment alone does not warrant this grand word about outward display.
literary
effulgent
for deliberately ornate praise of shining splendor
not when Most cards and workplace writing need a less rare word; effulgent calls attention to the writer.
literary
luminous
for an almost light-filled beauty or presence
not when Avoid it in a plain resume line, where its poetic glow can sound inflated.

radiant smile
Her radiant smile reassured everyone waiting outside the interview room.
radiant health
Weeks of rest returned the climber to radiant health.
radiant bride
The radiant bride paused to embrace her grandmother before the ceremony.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.