deich (Irish)

Where does "deich" come from?

The Irish word 'deich' for ten traces its roots back to the ancient Proto-Indo-European term *déḱm̥. This ancestor word evolved through the Proto-Celtic language as *dekam before eventually being inherited by Old Irish as 'deich'.

Full etymology tree

• deich (Irish), 'ten'
  • inherited deich (Old Irish), 'ten'
    • inherited *dekam (Proto-Celtic), 'ten'
      • inherited *déḱm̥ (Proto-Indo-European), 'ten'

Ancestors

• deich (Old Irish)
• *dekam (Proto-Celtic)
• *déḱm̥ (Proto-Indo-European)

Descendants and derived words

• deichiú (Irish)
• deichniúr (Irish)

Updated July 2026

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