Jocularity (noun)

Good-humored playfulness or humor.

Origin:

From the latin word "joculator" meaning "joker" or "jester".

Examples:

1. He spoke with a jocularity that made everyone feel at ease.
2. The jocularity of the conversation made the meeting more enjoyable.
3. She had a natural jocularity that made everyone around her feel happy.
4. He greeted us with a jocularity, making a joke about the weather.
5. The jocularity of the party made it a memorable event.