The word “mysterie” itself has 6 letters.
Do you mean any of the following 6-letter words related to mystery?
- Enigma – a puzzling or inexplicable thing or person.
- Secret – something kept hidden or concealed.
- Arcane – mysterious or secret.
- Occult – relating to the supernatural or hidden knowledge.
- Cipher – a secret or disguised way of writing.
- Clue – a piece of information that helps solve a mystery.
Let me know if you have any other questions.