The Senator is a tough adversary, but a man who accepts defeat with no recriminations whatever.

To date, Helicobacter remains a tough adversary, but doctors have achieved slowly improving results using drug combinations.

The ringing sound of that last impact played in his mind, though; giants were tough enough adversaries without metal armor!

We couldn't count on our old friends for help, because Iran is a pretty tough adversary, far stronger than Iraq was.

"Other companies are going to find themselves in a very unpleasant situation with a very tough adversary."

When the clone's death became common knowledge, he would become an even tougher adversary.

I freed President Chambers and he helped me-you've got a tough adversary in him.

He has been described as the toughest adversary the Team ever faced, and his investigation led to their ultimate downfall.

With their toughest adversary out of the picture, watch Washington take the whole shootin' match.

They would be like Brubaker, unwilling to join up but tough adversaries when there was no alternative.