wakeful
[ˈwekfəl]
adj.
失眠的;
不能入睡的;
（夜间一段时间）没怎么睡的;
不眠的;
例句:
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He lay wakeful all night.
他躺在床上彻夜未眠。
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He was wakeful yesterday.
他昨天没有睡着.
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Wakeful babies will often continue to need little sleep as they grow older.
通常睡眠轻的婴儿长大后仍然只需要较少的睡眠。
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It makes you feel bright, alert, chatty, wakeful.
来自BBC
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BZP is a man-made stimulant drug that makes you feel alert and wakeful.
来自BBC
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Experiments even reveal that there is unity of contents in wakeful thought and dreamstate cognition.
来自SA