Enthusiasm (noun)

1. Great excitement for or interest in a subject or cause.
2. A feeling of energetic and active interest in something.

Origin:

From ancient greek ἐνθουσιαστής (enthousiastēs, "inspired, possessed by a god, enthusiastic"), from ἐν (en, "in") + θεός (theos, "god") + -ιαστής (-iastēs, "performer").

Examples:

1. He spoke with great enthusiasm about the project.
2. She had an enthusiasm for learning.
3. The crowd showed enthusiasm for the game.
4. The children had an enthusiasm for playing.
5. The team had a lot of enthusiasm for the competition.