Time seemed to have become viscous.

Thixotropic liquids, that become less viscous over time when shaken, agitated, or otherwise stressed.

Rheopectic liquids, that become more viscous over time when shaken, agitated, or otherwise stressed.

Heat from the boilers kept the oil warm and prevented it from becoming too viscous in cold weather.

He could feel it thickening around them, becoming viscous.

While the discomfort rises, at least the deadland's mud has become less viscous, and progress somewhat less laborious.

Ensure an adequate fluid input to prevent secretions becoming too viscous (thick and sticky).

It felt like the air in the room had become viscous and her extremities leaden.

It had twisted, become viscous, and slipped amorphously from his straining fingers.

Then their tear ducts became more viscous and stuck their eyelids together.