hidden danger

The channels between them appeared to be clear and free from hidden danger.

And then, stepping daintily, every sense alert for hidden danger, came sleek Bana—the deer.

It was as though some hidden danger were hanging over them, the more terrible because mysterious.

They are capable of receiving the largest class of vessels, and are without a single hidden danger.

Unconscious of hidden danger, the unsuspecting Boers in the course of their operations drew near to the farm.