ocho (Spanish)

Where does "ocho" come from?

The Spanish word 'ocho' comes directly from Old Spanish 'ocho'[1], which developed from an earlier intermediate form '*oito'[1]. This ancestor traces back to Latin 'octō'[1][3], which in turn stems from Proto-Italic '*oktō'[2][5]. Ultimately, the numeral derives from the Proto-Indo-European dual form '*oḱtṓw'[1][4]. Over time, Spanish also extended the number's basic numerical sense to descriptive shapes like the figure of eight knot and informal slang meanings.

Open questions

• The intermediate Old Spanish form '*oito' is an unattested, reconstructed stage. [1]
• The proposal that the Proto-Indo-European root reflects an original dual form meaning two sets of four fingers relies on comparative reconstruction rather than direct documentation. [2] [4]

Full etymology tree

• ocho (Spanish), 'eight'
  • inherited ocho (Old Spanish), 'eight (8)'
    • inherited *oito (Old Spanish)
      • inherited octo (Latin), 'eight; 8'
        • derived *oktō (Proto-Italic), 'eight'
          • inherited *oḱtṓw (Proto-Indo-European), 'eight'
            • derived *(H)oḱto- (Proto-Indo-European)

Ancestors

• ocho (Old Spanish)
• octo (Latin)
• *oḱtṓw (Proto-Indo-European)

Cognates and doublets

• ὀκτώ (Ancient Greek)
• eahta (Old English)
• oito (Portuguese)

Sources

1. ocho (Spanish) - Wiktionary
2. octo (Latin) - Wiktionary
3. ocho (Old Spanish) - Wiktionary
4. oḱtṓw (Proto-Indo-European) - Wiktionary
5. oktō (Proto-Italic) - Wiktionary

Updated September 2026

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