fraternize
verb
[ ˈfratənʌɪz ]
• associate or form a friendship with someone, especially when one is not supposed to.
• "she ignored Elisabeth's warning glare against fraternizing with the enemy"
Similar:
associate,
mix,
mingle,
consort,
socialize,
go around,
keep company,
rub shoulders,
hang around,
hang round,
hang about,
hang out,
run around,
knock about,
knock around,
hobnob,
pal up,
pal around,
chum around,
be thick with,
rub elbows,
Origin:
early 17th century: from French fraterniser, from medieval Latin fraternizare, from Latin fraternus ‘brotherly’ (see fraternal).