asbestos describes fire portrayed as continuing without being quenched, whether burning chaff or associated with Gehenna.

Across all three verses, the adjective qualifies fire as continuing without being quenched: twice in the burning of chaff and once in the warning about going into Gehenna.

1. Fire not being quenched · dominant

   In Matthew 3:12 and Luke 3:17, the dative singular neuter form occurs with fire in the clause about burning chaff after grain is gathered. In Mark 9:43, the accusative singular neuter form likewise occurs with fire in the warning about going into Gehenna; the APB renders each clause with “unquenchable fire.”

   Matthew 3:12Luke 3:17Mark 9:43

In the Anselm Project Bible: The APB presents the term in all three verses through the phrase “unquenchable fire.” This reflects the clause-level presentation rather than a separate lexical mapping.