antagonize
verb (used with object)
to make hostile or unfriendly; make an enemy or antagonist of.
Used to describe an ongoing action or continuous state that was happening at a specific time in the past.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The U.S. and Russia have cooperated and fraternized marvellously in space even as their leaders were antagonizing each other.
From New York Times ● Dec. 12, 2017