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See more synonyms for ardor on Thesaurus.com
  1. great warmth of feeling; fervor; passion: She spoke persuasively and with ardor.
  2. intense devotion, eagerness, or enthusiasm; zeal: his well-known ardor for Chinese art.
  3. burning heat.
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Also especially British, ar·dour.

Origin of ardor

1350–1400; Middle English < Latin, equivalent to ārd(ēre) to burn + -or -or1; replacing Middle English ardure < Old French ardur < Latin, as above; 17th century ardour < Anglo-French < Latin, as above


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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

eagerness, zeal, earnestness, intensity, passion, fervor, warmth, zing, zest, avidity, fire, weakness, jazz, gusto, keenness, heat, vehemence, oomph, verve, fierceness

Examples from the Web for ardor

Contemporary Examples

Historical Examples

  • The ardor of Mr. Gladstone's feelings on this subject is notorious.

    The Grand Old Man

    Richard B. Cook

  • Man-like, hot with the ardor of the chase, he was deaf and blind to all else.

    The Black Bag

    Louis Joseph Vance

  • This feeling, be it understood, in no wise chilled my ardor.

  • He had been prepared for it, and to resist it, and break it down by the ardor of his appeal.

    The Law-Breakers

    Ridgwell Cullum

  • It was a problem which he debated with an ardor that had in it something of passion.

    A Spirit in Prison

    Robert Hichens

Word Origin and History for ardor


early 15c., "heat of passion or desire," from Old French ardure "heat, glow; passion" (12c.), from Latin ardorem (nominative ardor) "a flame, fire, burning, heat;" also of feelings, etc., "eagerness, zeal," from ardere "to burn" (see ardent). In Middle English, used of base passions; since Milton's time, of noble ones.

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Online Etymology Dictionary, © 2010 Douglas Harper