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diarchy

/ˈdaɪ.ɑɹ.ki/noun

diarchy is a noun meaning “Rule by two people” (English Wiktionary, September 2026). It is spelled D-I-A-R-C-H-Y, and it appears about once in every 91 million words in written English (wordfreq, 2021 data). The plural of diarchy is diarchies.

What does diarchy mean?

noun

  1. 1

    Rule by two people.

    Djokovic finally cracked the Federer-Nadal diarchy in 2010.

  2. 2

    A state under the rule of two people; the form of government of such state.

    Swaziland is an absolute diarchy, ruled jointly by a king and a queen mother.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

How do you pronounce diarchy?

  • /ˈdaɪ.ɑɹ.ki/
  • /ˈdaɪ.ɑː.ki/

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-diarchy.wav, Wikimedia Commons (author and licence on each file's page).

Forms of diarchy

  • diarchies plural
  • dinarchy
  • dyarchy

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

How common is diarchy?

Diarchy appears about once in every 91 million words in written English, the 305,310th most frequent word form in the list.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

Diarchy in Spanish, French, German and Portuguese

In the sense form of government:

LanguageWords
Frenchdyarchie, diarchie
GermanDiarchie, Doppelherrschaft, Biarchie
Portuguesediarquia
Spanishdiarquía

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.

Where does diarchy come from?

From di- + -archy. Modelled after monarchy.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).