Answer:
Light
Step-by-step explanation:
bright = light and colorful or very well or overly lit
"It was very bright out today, the sun kept getting in my eyes."
shiny = reflective of light
"I found this shiny shell, the way it reflected the light was dazzling."
airy = feels light and flowy
"The dress felt airy around her legs. She twirled gently just to make sure it was real."