TAKOBOTO

surely not
I never expected you would come

Add formation 

よもやそんなことはありえない

That can't possbly be true!

よもやそんなことはあるまい。

It is highly improbable.

わたしはよもやかのじょがゆうざいだとはおもってもみなかった。

I hadn`t the slightest suspicion of her guilt.

よもや and まさか are interchangeable, but よもや I think is more critical about incredulity than まさか.

bamboo4

Can よもや be used as a stand alone word (i.e. "I can't believe it!") the same way まさか can?

vigokrell