Strong's #3692: ope (pronounced op-ay')
probably from 3700; a hole (as if for light), i.e. cavern; by analogy, a spring (of water):--cave, place.
Thayer's Greek Lexicon:
̓́
opē
1) through which one can see, an opening, an aperture
1a) of a window
1b) of fissures in the earth
1c) of caves in rocks or mountains, holes
Part of Speech: noun feminine
Relation: probably from G3700
Usage:
This word is used 2 times:
Hebrews 11:38: "and in dens and caves of the earth."
James 3:11: "at the same place sweet water and bitter?"