1.
deep sleep, sound sleep
Sleeping deeply and soundly without waking, resulting in a well-rested state.
昨夜は熟睡できた。
I slept soundly last night.
疲れていたので、熟睡してしまった。
I was so tired that I fell into a deep sleep.
静かな環境のおかげで、久しぶりに熟睡することができた。
Thanks to the quiet environment, I was able to sleep soundly for the first time in a while.
USAGE:
Often used with できる (熟睡できた = I slept well) or する (熟睡した = I slept deeply). Implies a particularly restful, uninterrupted sleep — more than just 寝る (to sleep) or 眠る (to fall asleep).
SIMILAR WORDS:
- 爆睡: sleeping like a log (more casual, emphasizes sleeping so hard you can't be woken)
- 熟睡: deep, quality sleep (more neutral/formal)
COMMON COLLOCATIONS:
- 熟睡する: to sleep soundly
- 熟睡できない: can't sleep deeply
- 熟睡できる環境: an environment conducive to deep sleep
Related Words
Antonym:
不眠 (insomnia)