相关单词近义词 sleeplessness 失眠, alertness 警戒, vigilance 警戒, watchfulness 警觉性, restlessness 辗转不安, insomnia 失眠, restiveness 倔强, attentiveness 注意, awareness 认识反义词sleepiness, 想睡，困倦临近词wake, Wakese 返回 wakefulness