The chief or principal apostle, especially referring to Saint Peter as the leader of the apostles.
From arch- (chief, principal) + apostle (a messenger or follower of Jesus). The prefix arch- comes from Greek arkhos meaning 'ruler' or 'chief,' combined with apostle from Greek apostolos 'one sent forth.' The term emerged in medieval religious literature to denote primacy.
This word reveals how medieval religious scholars loved to create hierarchies—Peter wasn't just an apostle, he had to be the *arch*apostle, the head of the pack. It's a linguistic mirror of how the Church itself was organizing its power structure during those centuries.
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