fraternize

• fraternise (non-Oxford British spelling, used in many Commonwealth countries but not Canada)

From French fraterniser.

• (Received Pronunciation) IPA^(key): /ˈfɹætənɑɪz/
• (US) IPA^(key): /ˈfɹætɚnɑɪz/

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fraternize (third-person singular simple present fraternizes, present participle fraternizing, simple past and past participle fraternized)

1. (intransitive) To associate with others in a brotherly or friendly manner.
2. (intransitive) To associate as friends with an enemy, in violation of duty.
3. (intransitive) To have an intimate or sexual relationship with a forbidden member of the opposite sex; as, in some cases, football players with cheerleaders.

• frat
• fraternal
• fraternity
• fraternisation / fraternization
• fraternizing
• fratricide