"Football was great to give you a certain toughness, a feeling that you can go out and do something every day," Garcia said.

Pop music has become so loud, so concerned with showing off its technology, that a certain toughness is built in.

According to Pieper, both of these experiences instilled him with a certain toughness.

The fragile old woman still had a certain toughness.

You need a certain toughness for street ball, and you can't teach heart.

He had in him a certain toughness of fibre, that would have been proof against a whole dictionary.

Also, he brought a certain toughness to the Yankees.

There was a certain toughness to their skin, which, on close inspection, resembled the hides of great animals.

It ensures that, at the very end of the film, a certain toughness persists.

Their presence added a certain toughness the team had not seen in some time.