The very idea of his thinking that terrified her so much she could not reply to it.
The idea of returning to the States, where he would have to live up to his potential or face being called a failure, terrified him.
This idea terrified my companion, who wanted to keep going.
The idea of trying to find their way in total darkness terrified them all.
Of course he did-and at the same time, the idea terrified him.
The idea of being put off the ship terrified me.
But he knew it would be dark soon, and the idea terrified him.
But the idea of actually travelling to such a far off place terrified her.
The very idea of such a meeting terrified him.
The idea that she had any of those diseases terrified her.