His hands were shaking imperceptibly when his gaze met hers again.

He measured each word out with great care; his voice shook almost imperceptibly.

The woman glanced at Jehu, who imperceptibly shook his head.

Toby looked at him, and imperceptibly shook his head.

His gaze went to Palin and he almost imperceptibly shook his head.

The hand that held the glass shook almost imperceptibly.

She smiled at me, just a little, and almost imperceptibly shook her head.

Rayford glanced at Mac, who almost imperceptibly shook his head.

I could see his knees shake though almost imperceptibly.

His hand shook imperceptibly as he held the radar control handle.