fraternize

US /ˈfræt̬.ɚ.naɪz/
UK /ˈfræt̬.ɚ.naɪz/
1.

kết thân với nhau

to meet someone socially, especially someone who belongs to an opposing army or team, or has a different social position:

:
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Do the doctors fraternize much with the nurses here?
:
fraternity