This is the 4507th most frequent Japanese word.
寝
"寝" means "sleep" or "to lie down."
Here, '寝' is part of the verb '寝る,' meaning 'to sleep.' It is used to express the activity of sleeping in a specific location.
この布団で寝るのは気持ちがいいです。
Sleeping on this futon feels nice.
In this example, '寝' appears in the verb form '寝て' as part of the action '寝てしまう,' indicating the unintended act of sleeping.
彼は机の上で寝てしまいました。
He ended up sleeping on the desk.
In this sentence, '寝' is used as a verb ('寝る'), meaning 'to sleep' or 'to go to bed'. It describes the action of sleeping.