noun
vivacity
vih-VAS-uh-tee/vɪˈvæsəti/
Lively, spirited personal energy.
The man's vivacity enlivens the conversation with energetic gestures and a sparkling smile.

Etymology
Vivax describes something lively or energetic, and the noun ending turns that into a quality. Vivacity applies this vitality to someone's manner or character: animation and spirited energy.
In context
grief had given softness and a winning mildness to her her manners which had before been remarkable for vivacity nor was her residence at her mother's house of a nature to restore her gayety
More examples
- The actor brings warmth and vivacity to the role.
- Even after a long shift, she greets us with vivacity.
- His quick smile and vivacity put the new students at ease.
Forms
vivacity
vivacious adjective — Full of lively, spirited energy.
Similar words
- liveliness
- Liveliness is broader and can describe places as well as people.
- animation
- Animation emphasizes visible excitement in someone's face, voice, or gestures.
- exuberance
- Exuberance suggests more intense, overflowing enthusiasm and high spirits.