duende [dwen-day] (adjective) is a spanish word which cannot be translated in any other language.

This wonderful word captures an entire world of passion, energy, and artistic excellence and describes a climactic show of spirit in a performance or work of art. Duende originally meant "imp" or "goblin" and came to mean anything magical. It now has a depth and complexity of meaning that crosses artistic borders, from flamenco dancing to bullfighting. The Spanish poet Garcia Lorca wrote an eloquent essay on duende that explores the complex and inspirational flavor of its sense, and I know no better introduction.