Even Jan, for all his curiosity and scientific detachment, sometimes found himself on the verge of unreasoning terror.

But now Tas found himself a prey to the most unreasoning terror he had ever experienced.

He felt an unreasoning terror at their touch, like a child in the grip of nightmare shadows.

She was scared and angry, but most of all she felt an unreasoning terror that everything was closing in on her.

In an instant, Spock's mind was inundated with blind, unreasoning terror.

Then the same unreasoning terror hit him.

The feeling of unbearable, unreasoning terror was gone.

But a blind unreasoning terror froze her tongue to her palate.

But it seemed ages that we ran in blind, unreasoning terror.

The thought that he would somehow leave them filled her with unreasoning terror.