Vehemence (noun)

1. Great forcefulness or intensity of emotion or conviction; passion.
2. Fervor, intensity or passion in expression or action.

Origin:

From the latin word "vehemens" meaning "forceful, violent".

Examples:

1. The speaker spoke with vehemence about the issue.
2. He argued with vehemence against the proposal.
3. She spoke with vehemence, her face turning red with passion.
4. He felt the vehemence of her words, as she spoke with great intensity.
5. The vehemence of her speech left a lasting impression on the audience.