灿烂用英语可以翻译为"brilliant"或"radiant". 来源是源自拉丁语的词根"bri-"和"radi-", 都有"光亮"的意思。

例句：

The fireworks were absolutely brilliant. (那些烟花真是灿烂极了。)

She has a radiant smile. (她有一个灿烂的笑容。)