Japanese phrase
おやすみなさい。 o ya su mi na sa i
Meaning
Good night.
When to use it
A warm farewell used when someone is going to sleep. It sounds polite and natural among family, friends, and people who know each other well.
Example dialogue
明日は早いので、もう寝ます。 asu wa haya i no de mō ne ma su
I have to get up early tomorrow, so I am going to bed now.
おやすみなさい。 o ya su mi na sa i
Good night.