The なさい grammar point is used to give orders or instructions, often by authority figures when addressing someone younger or of lower status. It sounds polite but can be strong and direct.
構造
パターン
Verb-stem + なさい
verb stemThe base form of the verb before adding なさい.
例: 掃除し, 勉強し, 起き
なさいAttached to the verb stem to express a polite but strong command or instruction.