Etymology

sourness

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Today it means: The condition or quality of being sour. Full definition →

Middle English sowrenesse ← Old English sūrnes
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The story

  1. Old English · inherited fromsūrnes“sourness”
  2. Middle English · inherited fromsowrenesse
  3. English todaysourness

From Middle English sowrenesse, sournesse, from Old English sūrnes (“sourness”), equivalent to sour + -ness.

Etymology from Wiktionary, CC BY-SA 4.0.