よもや

adverb

surely not; certainly not

Used with a negative sentence to express strong disbelief or conviction that something cannot happen. Often carries a rhetorical or emphatic tone.

• よもや彼かれがそんなことをするとは思おもわなかった。

  I never thought he would do such a thing.

• よもや負まけるとは思おもっていなかった。

  I never dreamed we would lose.