incisiveness

The soft Southern burr of his ordinary conversation had given place to a clear incisiveness.

Cold, hard rays penetrate through the immense ruin, separating with a sharp incisiveness the light from the shadows.

You are perfectly right, he said with sudden, smiting incisiveness.

But the Coroner's voice broke in upon his flounderings with sharp incisiveness.

Carney asked, the crisp incisiveness of his voice wakening completely the rather fogged man.