leaven

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English[edit]

Etymology[edit]

From Middle English levayn, borrowed from Old French levain, from Vulgar Latin *levāmen, a noun based on Latin levō (raise).

Pronunciation[edit]

  • (UK, US) IPA(key): /ˈlɛv.ən/, [ˈlɛvn̩]
  • (file)
  • Rhymes: -ɛvən

Noun[edit]

leaven (countable and uncountable, plural leavens)

  1. Any agent used to make dough rise or to have a similar effect on baked goods.
  2. (figurative) Anything that induces change, especially a corrupting or vitiating change.

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Verb[edit]

leaven (third-person singular simple present leavens, present participle leavening, simple past and past participle leavened)

  1. (transitive) To add a leavening agent.
  2. (transitive) To cause to rise by fermentation.
  3. (transitive, figuratively) To temper an action or decision.
    • c. 1603–1604 (date written), William Shakespeare, “Measure for Measure”, in Mr. William Shakespeares Comedies, Histories, & Tragedies [] (First Folio), London: [] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act I, scene i]:
      Duke. No more euasion:
      We haue with a leauen'd, and prepared choice
      Proceeded to you; therefore take your honors:[...]
    • 1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, New York, N.Y.: Columbia University Press, →ISBN, page vii:
      With fresh material, taxonomic conclusions are leavened by recognition that the material examined reflects the site it occupied; a herbarium packet gives one only a small fraction of the data desirable for sound conclusions. Herbarium material does not, indeed, allow one to extrapolate safely: what you see is what you get []
  4. (transitive, figuratively) To imbue; to infect; to vitiate.
    • 1649, John Milton, Eikonoklastes[1], London, published 1756, page 30:
      With these and the like deceivable doctrines, he levens also his prayer.
    • 1716, Thomas Browne, edited by Samuel Johnson, Christian Morals[2], 2nd edition, London: J. Payne, published 1756, Part I, p. 7:
      [] pursue virtue virtuously: leven not good actions, nor render virtues disputable. Stain not fair acts with foul intentions []
  5. To rise or become larger. (Can we add an example for this sense?)

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West Frisian[edit]

Noun[edit]

leaven

  1. plural of leaf