0 past simple and past participle of fraternize
1 to meet someone socially, especially someone who belongs to an opposing army or team, or has a different social position:
Officers from both armies, however, fraternized openly during the campaign.
In coming days, soldiers from both sides would come out to the clearing between their positions and fraternized.
Tribesmen of both sides celebrated the decision until that day, and for two days after it went into effect, they fraternized at several places.
Not only that, soldiers from both sides often fraternized in the same taverns between battles.