His face now betrayed little or nothing of what he might be feeling.

His face betrayed that he wasn't sure whether to say yes or no.

Does my face betray the change that's taken place in me?

They looked long and hard at each other but their faces betrayed nothing.

His face and voice now betrayed no emotion of any sort.

Beside her stood a man whose face betrayed him as he who had passed me a note.

This was not a man whose face or gestures would betray him.

My mouth was dry, but his face betrayed no sign of recognition.

Her clear face betrayed no grief or anxiety at all.

He looked across at Ate, whose face betrayed a similar disappointment.