艶
つや · tsuya · JLPT N2 · noun
gloss
🍩 艶 = 豊 (abundant) + 色 (color): rich, full color, so lustrous gloss
Gloss and glaze both name a surface sheen. The character combines 色 (color) with 豊 (abundant), so its core idea is color that is rich and full, which gives the glossy finish.