〜なさい
Formation
N4
Meaning
Used to give a command or strong instruction to someone of lower status, such as from a parent to a child or a teacher to a student. It is less harsh than the imperative form (~ろ/~え) but still firm.
Examples
野菜をしっかり食べなさい。
Eat your vegetables properly.
早く寝なさい。
Go to bed early.
宿題をやりなさい。
Do your homework.
静かにしなさい。
Be quiet.