They were fraternizing in secret, away from prying eyes.
fraternize openly
Frequency:
65
%
The soldiers were told not to fraternize openly with the locals.
fraternize casually
Frequency:
50
%
It's important not to fraternize casually with colleagues in a professional setting.
Idiomatic Expressions for fraternize
Phrase: fraternize with the locals
Meaning: to socialize or mingle with the residents or natives of a particular place
Usage: While traveling, it's always a good idea to fraternize with the locals to learn more about the culture.