A ruler or leader who exercises authority from both sides or who governs with dual power structures.
From Greek 'amphi' (both) and 'arkhia' (rule or authority), constructed similarly to 'monarchy' and 'anarchy'. This rare term emerged in political theory to describe non-standard power distributions.
While most political terms describe single-source power, this word captures something that actually happens a lot in history—like co-rulers or constitutional systems where power truly splits between two authorities.
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