Keep the geblings from running away, force them to stand against him, so they can concentrate all their strength on killing him.

It will take them time to concentrate their strength.

If we concentrate our full strength, we are still strong enough to be a factor in the situation.

Ian concentrated all his strength on running, trying not to think of the thunder behind him or to remember Beth's wound.

Tim closed his eyes, then opened them again, as if trying to concentrate his strength.

Lord Roberts was concentrating his strength upon those objects which were vital, and letting the others drift for a time.

And the decision had already been taken to concentrate our strength on the large cities.

He concentrated his coordinated strength around the sense of his better self.

But the second was the more powerful, for it concentrated their strength.

When that time comes, the Demons will concentrate their strength at the wall's weakest point and break free.