Acting as a peer or equal to someone; keeping company with someone of equal rank.
From 'compeer' (a peer, equal, or companion), derived from Old French 'comper' (from Latin 'com-' meaning 'with' plus 'par' meaning 'equal'). The '-ing' suffix creates the present participle.
The word 'peer' itself has medieval roots in the aristocratic peerage system, so 'compeering' originally meant mingling as a social equal—a privilege not everyone had.
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