τρεῖς (Ancient Greek)

Where does "τρεῖς" come from?

The Ancient Greek word 'τρεῖς' (treîs) shares a deep ancestral root with many modern European and Indo-European languages, tracing back to the Proto-Indo-European term *tréyes. This word migrated through Proto-Hellenic to reach Ancient Greek while remaining fundamentally linked to cognates like the Latin 'trēs' and the English 'three'. Philosophers even once theorized that this ancient root originally referenced the 'middle' or protruding finger, reflecting the enduring connection between counting and the human body.

Full etymology tree

• τρεῖς (treîs) (Ancient Greek), 'three'
  • inherited *tréyes (Proto-Hellenic), 'three'
    • inherited *tréyes (Proto-Indo-European), 'three'

Ancestors

• *tréyes (Proto-Hellenic)
• *tréyes (Proto-Indo-European)

Cognates and doublets

• three (English)
• tres (Latin)
• երեք (Old Armenian)
• þreo (Old English)
• त्रि (Sanskrit)

Descendants and derived words

• τρεις (Greek)

Updated July 2026

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Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris