~なさんな
(Please) do not, Do not, Don't (prohibitive)
JLPT
N1
構造
✦V + なさんな
意味
✦This is a colloquial expression, formed by adding the prohibition particle な to the honorific form of the verb 「する」which is 「なさい」. It is only used in intimate relationships and is often used by older people. In polite situations, it can be replaced with 「ないでください」.
風邪
などひきなさんな
。
Don't catch a cold.
大丈夫
だから
、
そんなに
心配
しなさんな
。
It's okay, so don't worry too much.
