英和和英

not knowing anybody

Nobody will be the wiser.

No one will know.

No one can tell.

No one will know.

I know nothing

I do not know anything.

unknown to most people

the state of being totally unfamiliar with something

He is an utter stranger―a complete stranger―a perfect stranger―to me.

Who can say?

without someone's knowledge

I have no clue.

I have no idea.

I don't know anything at all.

I don't know anything about ～ .

You're asking the wrong person.

I wish I can help you, but I don't know

not known

without knowing it

I do not know for certain.

He can not know them

No one's frightened of playing it.

Nobody can understand it.

No one knows that.

without anyone's being the wiser

Nobody is looking

The coast is clear.

disappear without notifying anyone

not made known