The story's momentum is not helped when the same hollow threats are repeated over and over.

There would be no way to enforce the Proclamation, thus making it appear a desperate and hollow threat.

I do not see what advantage your government hopes to achieve with such a hollow threat.

But it was a hollow threat and they both knew it.

She glared at him, knowing it was a hollow threat.

"We've had dealings with them before and they've never yet made a hollow threat."

A hollow threat if ever there was one.

Personally, I think we can dismiss suicide as a hollow threat.

"I do not raise this as a hollow threat but as a harsh reality," he said at a news conference.

In the past few years, that sort of tactic was a hollow threat.