General opposites:
* Enthusiastic: This is a strong opposite, suggesting genuine excitement and eagerness.
* Hopeful: A belief in the possibility of positive outcomes.
* Idealistic: Having strong, often unrealistic beliefs in the goodness of people and the world.
* Passionate: Feeling strong emotions and excitement about something.
Opposites related to specific meanings of "jaded":
* Fresh: New, novel, and exciting, not yet worn out or disillusioned.
* Naïve: Lacking experience and knowledge, often with a positive connotation of innocence and openness.
* Innocent: Free from corruption or evil, often referring to a lack of cynicism.
* Optimistic: Having a positive outlook on life and expecting good things to happen.
Other words depending on the specific situation:
* Invigorated: Filled with energy and enthusiasm.
* Refreshed: Renewed and revitalized.
* Rejuvenated: Made young and vigorous again.
* Inspired: Filled with creative ideas and enthusiasm.
The best opposite word will depend on the specific context and the intended meaning.