Mystical (adjective)

1. Related to or characterized by religious mysticism or the pursuit of spiritual enlightenment.
2. Having a spiritual or otherworldly quality that is hard to understand or explain.

Origin:

Late middle english: from old french mystique or latin mysticus, from greek mustikos, from mustēs "initiate", from myein "to close the eyes or mouth" (in reference to the secrecy observed by initiates).

Examples:

1. He had a mystical experience while meditating.
2. The music had a mystical quality that transcended time and space.
3. The painting had a mystical aura about it.
4. The mystical teachings of the eastern religion were hard for her to grasp.
5. The mystical powers of the ancient gods were feared and revered.