This is the 160th most frequent Persian word.
نمی
"نمی" in Persian means "moisture" or "dampness."
Here, "نمی" negates the present tense verb "دانم" (I know).
من نمیدانم.
I do not know.
Here, "نمی" negates the verb "میخواهیم" (we want).
ما نمیخواهیم دیر کنیم.
We do not want to be late.
In this sentence, "نمی" negates the verb "میتواند" (can/is able to).