Strong's #762: asbestos (pronounced as'-bes-tos)

from 1 (as a negative particle) and a derivative of 4570; not extinguished, i.e. (by implication) perpetual:--not to be quenched, unquenchable.

Thayer's Greek Lexicon:

̓́

asbestos

1) unquenched, unquenchable

1a) of eternal hell fire to punish the damned

Part of Speech: adjective

Relation: from G1 (as a negative particle) and a derivative of G4570

Usage:

This word is used 4 times:

 

Matthew 3:12: "he will burn up the chaff with unquenchable fire."
Mark 9:43: "hell, into the fire that never shall be quenched:"
Mark 9:45: "hell, into the fire that never shall be quenched:"
Luke 3:17: "chaff he will burn with fire unquenchable."