kahdeksan (Finnish)

Where does "kahdeksan" come from?

The Finnish word 'kahdeksan' originates from the Proto-Finno-Permic term *kakteksa, which shares roots with related languages like Erzya and Moksha. It is built upon the word for 'two', reflecting a logical derivation also seen in the Finnish word for nine. Over time, the original form evolved through Proto-Finnic, eventually adopting a genitive ending to match other Finnish numbers.

Full etymology tree

• kahdeksan (Finnish), 'eight'
  • inherited kahdeksa (Finnish)
    • inherited *kaktëksa (Proto-Finnic), 'eight'
      • inherited *kakteksa (Proto-Finno-Permic)
        • compound *kakci (Proto-Finnic), 'two'
          • inherited *käktä ~ *kakta (Proto-Uralic)
        • compound second component of *kakteksa (Proto-Finno-Permic)

Ancestors

• *kaktëksa (Proto-Finnic)

Cognates and doublets

• кавксо (Erzya)
• кафкса (Moksha)

Descendants and derived words

• aamukahdeksan (Finnish)
• iltakahdeksan (Finnish)
• kahdeksainen (Finnish)
• kahdeksanbittinen (Finnish)
• kahdeksankertainen (Finnish)
• kahdeksankulmio (Finnish)
• kahdeksankymmenluku (Finnish)
• kahdeksankymmentä (Finnish)
• kahdeksankymmentäkahdeksan (Finnish)
• kahdeksankymmentävuotias (Finnish)
• kahdeksankymmenvuotias (Finnish)
• kahdeksanlainen (Finnish)

Updated July 2026

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