Ardor (noun)

1. Great enthusiasm or passion.
2. Intensity or heat of feeling or emotion.

Origin:

From the latin word "ardor" meaning heat, passion or enthusiasm.

Examples:

1. He spoke with great ardor about his plans for the company.
2. She felt a sudden ardor for the cause and joined the campaign.
3. He was filled with a burning ardor to succeed.
4. The crowd's ardor was palpable as they cheered on their team.
5. Her ardor for the work was evident in her dedication and effort.