Etymology

eighteen

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Today it means: The cardinal number occurring after seventeen and before nineteen, represented in Roman numerals as XVIII and in Arabic numerals as 18. Full definition →

Middle English eightetene ← Anglian Old English eahtatēne ← Proto-Germanic *ahtōutehun
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eighteen · numeral1

  1. Proto-Indo-European*oḱtṓw
  2. Proto-Germanic*ahtōu
  3. Proto-Indo-European*déḱm̥
  4. Proto-Germanic*tehun
  5. Proto-Germanic*ahtōutehun
  6. Anglian Old Englisheahtatēne
  7. Middle Englisheightetene
  8. English todayeighteen

From Middle English eightetene, eiȝtene, ehtetene, from Old English eahtatīene, eahtatēne, from Proto-Germanic *ahtōutehun. Cognate with West Frisian achttjin, Dutch achttien, German achtzehn, Danish atten. Equivalent to eight + -teen.

Eighteen · proper noun2

Derived from place names such as Ayton, Eaton, and Eton.

Etymology from Wiktionary, CC BY-SA 4.0.