Etymology

adust

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Today it means: Abnormally dark or over-concentrated (associated with various states of discomfort or illness, specifically being too hot or dry). Full definition →

First used 15th c.Middle French aduste ← Latin adustus
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The story

  1. Latin · derived fromadustus“burnt, scorched”
  2. Middle French · derived fromaduste
  3. English todayadust

From Middle French aduste, and its source, Latin adustus (“burnt, scorched”), past participle of adūrere.

First known use, by meaning

  • from 15th c. Abnormally dark or over-concentrated (associated with various states of discomfort or illness, specifically being too hot or dry).
  • from 15th c. Burnt or having a scorched colour.

Etymology from Wiktionary, CC BY-SA 4.0.