How to say "asleep" in Japanese

• 寝込みねこみ
  nounCovers 'asleep' in the sense of sleep taken in bed, and by extension being sick in bed; a less common choice, it is for someone lying asleep in bed rather than sleep in general.
• 夢寐むび
  noun, suru verbIt covers both 'asleep' and 'dreaming', treating sleep and dreams as one notion; being less common, it is seldom the natural choice for simply saying that someone is asleep.
• 眠れるねむれる
  pre-noun adjectivalRenders 'asleep' as sleeping or slumbering, and can also suggest resting; a formal or literary term that is less common, it suits written or elevated description rather than casual speech.

All three are less common choices for 'asleep': 「寝込み」 for someone asleep in bed (it also means sick in bed), 夢寐 when sleep and dreaming are meant together, and 「眠れる」 for formal or literary descriptions of sleeping.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 寝込みねこみasleep (in bed)
• 夢寐むびasleep
• 眠れるねむれるsleeping