σπήλαιον (spḗlaionspay'-lah-yonnouncave)
[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.