Mystery

A profound secret; something wholly unknown, or something kept cautiously concealed, and therefore exciting curiosity or wonder; something which has not been or can not be explained; hence, specifically, that which is beyond human comprehension.

A kind of secret religious celebration, to which none were admitted except those who had been initiated by certain preparatory ceremonies; -- usually plural; as, the Eleusinian mysteries.

The consecrated elements in the eucharist.

Anything artfully made difficult; an enigma.

A trade; a handicraft; hence, any business with which one is usually occupied.

A dramatic representation of a Scriptural subject, often some event in the life of Christ; a dramatic composition of this character; as, the Chester Mysteries, consisting of dramas acted by various craft associations in that city in the early part of the 14th century.

a story about a crime (usually murder) presented as a novel or play or movie