phrear denotes a well used for water or rescue, and in Revelation a shaft associated with the abyss.

The attested uses divide between a well in scenes of drawing water or pulling out a fallen son or ox, and the shaft associated with the abyss in Revelation's smoke-filled vision.

1. Shaft associated with the abyss · dominant

   In Revelation 9:1, the genitive form occurs in the clause about a key being given for “the shaft of the abyss.” In Revelation 9:2, the verse describes that shaft being opened and smoke ascending from it, while both attested surface forms occur in the verse.

   Revelation 9:1Revelation 9:2
2. Well as a water source or place of danger · common

   In John 4:11, the nominative singular form occurs where the woman says the well is deep and asks about living water; John 4:12 refers to Jacob giving it and drinking from it. In Luke 14:5, the accusative singular form occurs in the example of a son or ox falling into a well and being pulled out.

   John 4:11John 4:12Luke 14:5

In the Anselm Project Bible: The APB presents the John and Luke settings with “well,” while Revelation 9:1 and Revelation 9:2 use “shaft of the abyss.” These renderings show the clauses' presentation rather than a fixed one-to-one translation.