cryptal

/ˈkrɪptəl/
adjective
  1. Relating to a crypt or a hidden, underground chamber.
    • Archaeologists discovered a cryptal room filled with ancient pottery.
    • The cryptal passage beneath the old church was sealed for centuries.
    • The cryptal darkness made it hard to see without a flashlight.
What does "cryptal" mean? | whatsthatwordmean | whatsthatwordmean