Translation guide
Describes deep, restful, uninterrupted sleep. In Japanese, this is expressed through specific adjectives, adverbs, and set phrases rather than a single direct equivalent.
To describe sleeping deeply and soundly, often implying a good quality of sleep.
The most common and natural way to say 'sleep soundly'. ぐっすり is an adverb meaning 'soundly' or 'deeply', and 眠る means 'to sleep'.
昨夜はぐっすり眠れました。
I slept soundly last night.
赤ちゃんがぐっすり眠っている。
The baby is sleeping soundly.
To emphasize that sleep was not disturbed, often implying a sense of peace or security.
Means 'to sleep peacefully' or 'to have a quiet sleep'. Often used in wishes like 'sleep well' or descriptions of restful sleep.
安眠できる環境を整える。
Create an environment where you can sleep soundly.
どうぞご安眠ください。
Please sleep well. (polite)
To express the idea of sleeping very soundly, often in a figurative or emphatic way.
A casual, emphatic term meaning 'to sleep like a log' or 'to be dead to the world'. Very common in spoken Japanese.
昨日は爆睡しちゃった。
I slept like a log yesterday.
ぐっすり眠る is the most common, everyday expression for sleeping soundly. 熟睡する is slightly more formal and emphasizes the depth of sleep. 安眠する focuses on the peacefulness and lack of disturbance.
ぐっすり眠れて、朝すっきりした。
I slept soundly and felt refreshed in the morning.
熟睡するために、カフェインを控えている。
I avoid caffeine to get a deep sleep.
A slightly more formal or written term meaning 'deep sleep' or 'sound sleep'. Often used in contexts like 'I got a good night's sleep'.
熟睡できて、疲れが取れた。
I slept soundly and recovered from fatigue.
Literally 'deep sleep'. A noun phrase that can be used to describe the state of sleeping soundly.
深い眠りについた。
I fell into a deep sleep.
An onomatopoeic adverb describing peaceful, quiet sleep, often used for babies or children, but can be used for anyone sleeping soundly.
子どもがすやすや眠っている。
The child is sleeping soundly.
Literally 'sleep like mud', meaning to sleep very deeply, often from exhaustion. Somewhat literary or emphatic.
泥のように眠ってしまった。
I slept like a log (from exhaustion).
Noise that disturbs peaceful sleep is a problem.
Noise that disturbs peaceful sleep is a problem.