Definition - to associate especially in fellowship or partnership
Consociate is not merely a verb; it also functions as an adjective (“united in fellowship, intimately associated”) and as a noun (“one who is united with another”). It has the Latin word for “companion” (socius) in its origins, as does society, associate, and sociological phenomena.
I was born there; and born thither by a charitable desire of consociating and consorting with my Friends.
— Richard Carpenter, The Anabaptist washt and washt, and shrunk in the washing, 1653