speak in a whisper

As if what she's saying is something so personal she can only speak of it in whispers.

She came quickly to the door and the two women spoke in whispers.

They were speaking in whispers, but now even those died away.

The children were speaking in whispers so the teacher wouldn't hear them.

Even if he spoke in a whisper every word would come across clearly.

She spoke in a whisper that seemed to tax her.

I spoke in a whisper, not sure how it would feel to talk.

All at once he smiled and began to speak in a whisper.

His eyes closed with a will of their own, and he spoke in a whisper.

Charles spoke in a whisper and his eyes were cold.