lustre
(US luster), / ˈlʌstə(r); `lʌstɚ/ n [U]
1 soft brightness of a smooth or shining surface; sheen （光滑表面的）柔和光泽, 光彩
the deep lustre of pearls 珍珠浑厚的光泽.
2 (fig 比喻) glory; distinction 光荣; 出色
brave deeds adding lustre to one's name 使自己扬名增光的英勇业绩.