To associate or socialize as brothers; to behave in a friendly and familiar manner with someone.
From Latin 'fraternus' (fraternal) with the verbal suffix '-ate.' Less common than 'fraternize,' but carries similar meaning rooted in the concept of brotherhood.
While 'fraternate' is rare today, it appeared in historical texts to describe soldiers from enemy armies socializing during breaks in fighting—the idea that they could temporarily forget they were enemies and 'fraternate' like brothers.
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