coruscate
🇺🇸
/ˈkɔːrəskeɪt/
🇬🇧
/ˈkɒrəskeɪt/
to shine brightly and quickly, like a tiny flash of light
The small crystals in the cave started to coruscate as we shone our flashlights on them.
to be very lively and exciting
Her eyes began to coruscate with joy at the good news.