The lack of precision in Kimura's speech betrayed his unnatural excitement.

Heightened spots of color on her cheeks betrayed her excitement.

In spite of herself, Grace's rising color betrayed her ungovernable excitement.

"We'll be back soon," I say, trying to keep my voice from betraying my excitement.

"Glad you're back for this one," he said with a restrained grin that betrayed his excitement.

Of course, she must not betray her excitement.

He was not anxious to betray his excitement to Unger.

I was afraid that my eyes had begun to shine with hope and so would betray my excitement.

He felt Fraser's eyes rest on him briefly, but didn't meet them, for fear of betraying his excitement.

How well he knew those moments when M's cold eyes betrayed their excitement and their greed.