ardor

[ ahr-der ]
/ ˈɑr dər /

noun

great warmth of feeling; fervor; passion: She spoke persuasively and with ardor.
intense devotion, eagerness, or enthusiasm; zeal: his well-known ardor for Chinese art.
burning heat.
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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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