particle
Colloquial, gentle command or suggestion. Attaches to the -masu stem of a verb. Softer than a direct imperative.
See also: な
particle
don't ... (prohibitive)
Masculine, blunt prohibition. Attaches to the plain (dictionary) form of a verb. Stronger and more direct than ないで.
See also: な
そんなこと言うなよ。
Don't say that.
触るなよ。
Don't touch it.