It wasn't possible to follow the hulk into the open without giving away his presence.

It doesn't give away the hunter's presence as an active sonar would.

Then why had they allowed Veig to give away their presence by shouting?

All he might do was give away his presence.

This way, staying near the wall, there was less chance of creakings from the floor giving away his presence.

None of us dared even to breathe, lest we give away our presence there.

The sudden silence seemed to suggest something had given away their presence.

He put a finger to his lips to keep her from giving away his presence.

Tash-ket had been here for several weeks with orders to lie low and do nothing that might give away his presence.

A transition must be ruled out because it would give away our presence.