lack of sleep; insufficient sleep
Common everyday word for not getting enough sleep. Often used in the pattern 寝不足だ or 寝不足で.
昨日は寝不足で、一日中ぼんやりしていた。
I was sleep-deprived yesterday and felt foggy all day.
寝不足が続くと、体調を崩しやすくなる。
If lack of sleep continues, you become more prone to getting sick.
I've been so busy with work lately that I haven't been getting enough sleep.
My head feels fuzzy because of lack of sleep.
With exams coming up, I keep not getting enough sleep.
I slept a lot over the weekend to make up for lost sleep.
I attended the meeting looking exhausted from lack of sleep.