bright and sparkling
熠 centers on a vivid, sparkling brightness, like firelight or a gleaming flash. The given meaning 'bright and sparkling' captures this single luminous idea.
熠 combines 火 (fire) with 習, which likely contributes the sound and reinforces the idea of repeated or intense light, giving 'bright and sparkling.'
Fire 火 on the left and 習 (which can suggest repetition) on the right: imagine a fire that repeatedly flashes and sparkles, making everything bright and sparkling.
For ユウ, picture a sparkling fire that reminds you of a glowing 'U' shape: the 'U' sound cues ユウ while the fire flickers brightly.