"累"的英文是"tired"，它的来源是源自古英语"tēarian"，意思是"疲乏"。

例句：

I'm so tired. (我好累。)
I'm tired of working all the time. (我厌倦了一直工作。)
She's tired from staying up late last night. (她因昨晚熬夜而疲乏。)
He's always tired because he doesn't get enough sleep. (他总是累，因为他睡眠不足。)