ardor

/ˈɑː(ɹ)də(ɹ)/noun

Intense warmth of emotion; burning passion or enthusiasm.

Example sentence

“They threw themselves into the project with great ardor.”

Spelled "ardour" in British English. Literary in flavor; in conversation people say passion or enthusiasm instead.

Related words

arduousDemanding great effort and stamina; exhausting to carry out.ardentFeeling or showing intense enthusiasm or passion.arithmeticThe branch of mathematics that deals with numbers and the basic operations of adding, subtracting, multiplying, and dividing.archeryThe sport or skill of shooting arrows from a bow.arrivalThe act of reaching a place, especially at the end of a journey.archaicBelonging to a much earlier time; old-fashioned and no longer in common use.