What is the word for "no one" in Japanese?

Question:

Answer:

誰も・・・ない＝だれも・・・ない＝da re mo・・・nai

Ex. No one is here. だれもいない = daremo i nai　
Ex. No one knows. 　だれもしらない = daremo sira nai

a little complicated...? Or you can write ”無人”　= mujin. It is a noun.

I hope it works^^