Duende -

Spanish – While originally used to describe a mythical, spritelike entity that possesses humans and creates the feeling of awe of one’s surroundings in nature, its meaning has transitioned into referring to “the mysterious power that a work of art has to deeply move a person.” There’s actually a nightclub in the town of La Linea de la Concepcion, where I teach, named after this word.

[Also: 20 More Awesomely Untranslatable Words From Around the World]