Isabel looked at Justin, a certain wariness entering her eyes.

The captain couldn't help but smile back, albeit with a certain wariness.

A certain dull wariness came into the man's face as the two circled each other slowly, looking for an opening.

He watched her steadily, but with certain wariness beneath the calm.

His manner seemed to shift, becoming less suspicious, though a certain wariness remained.

Oh, I had no real evidence but a certain wariness, a feeling of unease.

Behind the offhand way she related her information, he sensed a certain wariness.

Her eyes narrowed and a certain wariness came into her face.

It brought her mind back, along with a certain wariness.

And frankly, there's a certain wariness among Republicans that she has not put this election away.