Webster’s Revised Unabridged Dictionary · 1913
Fraternize
Fra′ter·nize, v. i. [imp. & p. p. Fraternized (#); p. pr. & vb. n.. Fraternizing (#).] [Cf. F. fraterniser.] To associate or hold fellowship as brothers, or as men of like occupation or character; to have brotherly feelings.
Fra′ter·nize, v. t. To bring into fellowship or brotherly sympathy.
Correspondence for fraternizing the two nations. Burke.