DictionarymysteryUnknown or unexplained
noun / adjective

mystery

MIS-tuh-ree/ˈmɪstəri/

Something puzzling or not yet understood.

The contents of the locked ornate box remain a mystery.

A locked ornate box with an unknown object suggested inside, a single small question mark nearby.
Etymology

A mystery was originally a sacred rite or doctrine known only to initiates. The word broadened from hidden religious truth to anything whose meaning, cause, or explanation remains unknown.

In context

Fairfield University22:17
others all i can say is that i knew god nameless unfathomable silent and yet near bestowing upon me in his bestowing himself upon me in the fullness of his mystery
A Pilgrim's Journey: The Autobiography of St. Ignatius of Loyola Session Two

More examples

  • Scientists still study the mysteries of the deep ocean.
  • A mystery guest joins us for dinner tonight.
  • She reads a mystery on the train to work.

Forms

mystery · mysteries

mysterious adjective — Difficult to explain or identify.

Similar words

puzzle
Suggests a problem that reasoning or investigation can solve.
enigma
Often describes a person or thing that resists understanding.