Literature, from the very beginning, has had a single enemy, and that is the restriction of the expressed idea.

We'll lose horses and men from the weather even if we don't see a single enemy.

The other had heard a report that there had been but a single enemy.

Better to share a nest with a single enemy than face destruction by the pack.

A thousand friends have less weight than a single enemy.

She has the ability to charm a single enemy and calm them.

He was stung by the thought of fleeing so long from a single enemy.

A single enemy did not require the entire tribe for his punishment.

The second thought is that renewable energy sources really only have one single enemy.

Again the ritual started, the quarry now a single enemy.