Sir, I shall not be slack; in sign whereof, Please ye we may contrive this afternoon, And quaff carouses to our mistress’ health; And do as adversaries do in law, Strive mightily, but eat and drink as friends.
There are no more uses of "adversary" in the play.
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Then, again, our military training is in many respects superior to that of our adversaries.
Thucydides -- Pericles’s Funeral Oration
Finally, it was rumored, there would be complete information-sharing among all of these previously disconnected and even adversarial entities, and when they were coordinated, and once all the health data they’d collected was shared, most of this made possible through the Circle and more important, TruYou, viruses could be stopped at their sources, diseases would be tracked to their roots.