occult

Of, relating to, or dealing with supernatural or magical influences, agencies, or occurrences.

Available only to the initiate; secret or mysterious: synonym: mysterious.

Beyond the realm of human comprehension; inscrutable.

Hidden from view; concealed.

Detectable only by microscopic examination or chemical analysis, as a minute blood sample.

Not accompanied by readily detectable signs or symptoms.

Occult practices or techniques.

To conceal or cause to disappear from view.

To conceal by occultation.