Revelation of Jesus Christ
From the KJV 1611 with Strong's Concordance
G5421
φρέαρ
phrear
{freh'-ar}
Of uncertain derivation; a hole in the ground (dug for obtaining or holding water or other purposes), that is, a cistern or well; figuratively an abyss (as a prison).
pit
Luke 14:5. Revelation 9:1, 2.
well
John 4:11, 12.