Nai is a word used often in Japan. It is equivalent to the English word "not". Using our question words + mo construction, let us now add nai to them to see what kind of new words we can create.
We'll use the question words,"Who", "What",and "Where",
daremo + nai = daremo nai
who + also + not = nobody
nanimo + nai = nanimo nai
what + also + not = nothing
dokomo + nai = dokomo nai
where + also + not = nowhere