Myriarch

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A ruler or commander over 10,000 people, particularly; The commander of a Mongolian tomen. historical
  2. 2
    A ruler or commander over 10,000 people, particularly; The governor of a myriarchy in Mongolian Tibet. historical

Etymology

From Ancient Greek μυριάρχης (muriárkhēs) in Herodotus or μυρίαρχος (muríarkhos) in Xenophon, from μυρίος (muríos, “myriad, ten thousand”) + -άρχης (-árkhēs) or -αρχος (-arkhos, “-arch: ruler, commander”), calque of Old Persian *baivarapatiš. As a Mongolian commander, Calque of Mongolian tümen-ü noyon.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.