With its absence of competition and the ability to prevent others from entering the business, it has monopoly power.

And if aspirin has any ability to prevent strokes in healthy people, researchers have not yet been able to find it.

He said he alone had the ability to prevent that.

There have been doubts about Greece's ability to prevent terrorism.

Pacifism could not be justified by its ability to prevent war.

The first is a group of players close to the disc who attempt to contain the offenses' ability to pass and prevent forward movement.

Studies have clearly demonstrated their ability to prevent heart attacks and coronary deaths.

The captain finally lost all ability to prevent the plane from rolling to the right.

We have provided the ability to prevent handles from being spoofed.

But its ability to prevent fractures of other bones has not yet been demonstrated.