She made no move to stop him; she remained mute, with an unfathomable expression in her eyes.

She looked at me for a long moment, her expression unfathomable.

His head tilted to the side and an unfathomable expression crossed his face.

A green linkage led to the still face of a woman, her expression unfathomable.

Nurse Dolores was looking at him with an unfathomable expression.

He made no attempt to come closer, but stood looking at Duncan with a completely unfathomable expression, neither friendly nor hostile.

Helsse looked back at him with an unfathomable expression.

With a dark, unfathomable expression on his harshly handsome features, Gabriel took them both by the arm.

He was watching her with an unfathomable expression.

His eyes were dark, and he wore an unfathomable expression on his face.