Etymology

longest

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Today it means: Something that is longer than all others in its class. Full definition →

English long ← Middle English long ← Old English lang
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The story

  1. Proto-Indo-European*dlongʰos
  2. Proto-Germanic*langaz
  3. Proto-West Germanic*lang
  4. Old Englishlang
  5. Middle Englishlong
  6. Englishlong
  7. English todaylongest

From long + -est.

Etymology from Wiktionary, CC BY-SA 4.0.