Revelation of Jesus Christ
From the KJV 1611 with Strong's Concordance
G4693
σπήλαιον
spelaion
{spay'-lah-yon}
Neuter of a presumed derivation of σπέος [[speos]] (a grotto); a cavern; by implication a hiding place or resort.
cave
John 11:38.
den
Matthew 21:13. Mark 11:17. Luke 19:46.
dens
Hebrews 11:38. Revelation 6:15.