wakeful
adj. 醒着的；失眠的；警觉的
例句
He lay wakeful all night.
他躺在床上彻夜未眠。
《牛津词典》
She had spent many wakeful nights worrying about him.
她度过了许多不眠之夜，为他担心。
He himself was feeling quite wakeful and even lively, though he didn't know why.
他自己觉得很清醒，甚至充满活力，虽然他不知道为什么。
