stair (Irish)

Where does "stair" come from?

The Irish word 'stair' traces its roots back to the Proto-Indo-European root '*weyd-', meaning 'to see.' This evolved into the Ancient Greek word 'hístōr,' signifying a 'wise one' or 'knower,' which eventually passed through Latin into Old Irish as 'stoir.' Over time, this term shifted from ancient philosophical inquiries and knowledge into the modern Irish word for history, accounts, and fame.

Full etymology tree

• stair (Irish), 'history'
  • inherited stoir (Old Irish), 'history'
    • learned borrowing historia (Latin), 'a history'
      • learned borrowing ἱστορίᾱ (historíā) (Ancient Greek)
        • derived ἱστορέω (historéō) (Ancient Greek), 'to inquire, ask (of someone, or regarding someone/something)'
          • derived ἵστωρ (hístōr) (Ancient Greek), 'one who knows law and right, judge'
            • inherited *wístōr (Proto-Hellenic)
              • inherited *wéydtōr (Proto-Indo-European), 'one who has seen, one who knows'
                • derived *weyd- (Proto-Indo-European), 'to see'
                • suffix *-tōr (Proto-Indo-European), 'Derives agent nouns from verb roots, denoting someone or something who has performed the root's action.'
          • suffix -έω (-éō) (Ancient Greek), 'Used to form verbs from nouns, adjectives and other verbs. Often, not always, added to the stems of thematic nouns or adjectives in -ος (-os).'
        • suffix -ῐ́ᾱ (-íā) (Ancient Greek), 'Primitive suffix added to the stems of adjectives in -ύς (-ús) and some nouns to form feminine gender'
          • inherited *-i-eh₂ (Proto-Indo-European)

Ancestors

• *weyd- (Proto-Indo-European)
• stoir (Old Irish)
• historia (Latin)
• ἱστορία (Ancient Greek)

Cognates and doublets

• stór (Irish)

Descendants and derived words

• bréagstair (Irish)
• stairiúil (Irish)

Updated June 2026

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