Elections make sense; central-bank announcements replete with jargon, arcane policies, and acronyms do not stir souls.
The Garden of Cyrus, with its arcane explorations of botany and geometry, may as well be an alchemical treatise or a grimoire.
Everything is way too arcane, now, for most folks to understand.
1540s, from Latin arcanus "secret, hidden, private, concealed," from arcere "close up, enclose, contain," from arca "chest, box, place for safe-keeping," from PIE *ark- "to hold, contain, guard" (cf. Greek arkos "defense," arkein "to ward off;" Armenian argel "obstacle;" Lithuanian raktas "key," rakinti "to shut, lock").