σπήλαιον (spḗlaion|spay'-lah-yon|noun|cave)
[Grk] σπήλαιον LN: 1.57 GK: G5068 Hebrew: מְעָרָה‎, נָצַר‎, סָפָה‎
Derivation: neuter of a presumed derivative of σπέος (a grotto);
Strong's: a cavern; by implication, a hiding-place or resort
KJV: --cave, den.