Today’s Word “arcane”
arcane ar-KAYN (adjective) – Understood or known by only a few.
“Gustav had no skills in the arcane art himself, a fact he had bitterly regretted as a child, having mistakenly imagined that magic could solve all his problems, ease all his griefs, make everything right.” — Margaret Weis, Tracy Hickman, ‘Guardians of the Lost’
Arcane is derived from Latin arcanus, meaning “shut, closed, secret,” from arca, “chest, box.”