Arcano (en. Arcane)
/arˈka.no/
Slang Meanings
Hidden knowledge in esoteric circles.
That group only shares its arcane with initiates.
Ese grupo sólo comparte su arcano con iniciados.
Something very complicated or confusing.
That topic is an arcane to me; I don’t understand it.
Ese tema es un arcano para mí, no lo entiendo.