FAQs About the word sleeplessness

不眠

a temporary state in which you are unable (or unwilling) to sleep

不眠症,不安,警戒,覚醒

眠気,眠気,ナルコレプシー

sleeplessly => 眠らない, sleepless person => 眠れない人, sleepless => 眠れない, sleep-learning => 睡眠学習, sleepish => 眠たげ,