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."