A supreme or chief governor, especially one with the highest authority in a region or domain.
From arch- (chief, principal) combined with governor (one who governs). The prefix arch- comes from Greek archi-, meaning 'chief' or 'principal,' while governor derives from Old French governer, ultimately from Latin gubernare (to steer or rule).
Medieval and Renaissance texts used 'arch-' extensively to create hierarchies of power—an archgovernor was above a regular governor, just like an archbishop was above a regular bishop, showing how language itself encoded the feudal system.
Complete word intelligence in one call. Free tier — 50 lookups/day.