*occult
ɒˈkʌlt,ˈɒkʌlt/
noun
1. mystical, supernatural, or magical powers, practices, or phenomena.
"a secret society to study alchemy and the occult"
synonyms: the supernatural, the paranormal, supernaturalism, magic, black magic, witchcraft, sorcery, necromancy, wizardry, the black. arts, Kabbalah, cabbalism, occultism, diabolism, devil worship, devilry, voodoo, hoodoo, white magic, witchery, witching, orenda, mysticism.
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The word occult has its roots in the Latin occultus, meaning "hidden, secret."
That's why it can also be used as both a noun referring to black magic and an adjective meaning "difficult to see."
Quipped the famous physicist Heinz Pagels,
"I like to browse in occult bookshops if for no other reason than to refresh my commitment to science."