ἄσβεστος (asbestos)
asbestos
unquenchable
Quick Reference
- Language
- Koine Greek
- Testament
- New Testament
- Occurrences
- 4 verses
- Root
- —
Word Overview
The adjective asbestos means unquenchable or inextinguishable. It describes something that cannot be put out or extinguished by ordinary means. In the New Testament, it modifies fire to describe a judgment that persists beyond human ability to stop it.
This word appears only four times, concentrated in the Synoptic Gospels. Jesus uses it to depict the final separation of wheat from chaff, where the burning fire cannot be quenched (Matthew 3:12; Luke 3:17). Mark also employs it in warnings about Gehenna, emphasizing a fire that remains active and consuming (Mark 9:43).
Its etymology combines a negative prefix with a root meaning to quench or put out. This structure highlights the absolute nature of the fire described. Unlike natural fires that burn out when fuel is exhausted, this asbestos fire endures. Translators consistently render it as "unquenchable" to preserve the sense of permanent and inescapable consequence.
Based on public-domain lexicons (Strong's, Thayer, Gesenius, Brown-Driver-Briggs and others).
What This Word Means for Your Faith
The word asbestos describes a fire that cannot be put out. In the New Testament, it appears only four times to describe the final separation of good and evil. Jesus uses this image to show that God’s judgment is real and permanent. The chaff is burned with unquenchable fire, while the wheat is gathered safely into the barn.
This teaching calls us to take sin seriously. Mark records Jesus saying it is better to lose a hand or foot than to face this eternal fire. We are invited to choose life by turning away from what harms our souls. The promise of safety in God’s presence offers hope for those who seek Him with honest hearts.
How it's translated
How this word is rendered word-by-word in the 4 verses where it appears, by frequency.
- unquenchable.4×
Forms in the text
The inflected forms of this word as they appear in Scripture, by frequency.
- ἄσβεστον.2×
- ἀσβέστῳ.¶2×
Key Verses
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Matthew 3:12
His winnowing fork is in his hand, and he will thoroughly cleanse his threshing floor. He will gather his wheat into the barn, but the chaff he will burn up with unquenchable fire.”
This verse contrasts the safe gathering of wheat with the burning of chaff, showing the word describes the finality of judgment.
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Mark 9:43
If your hand causes you to stumble, cut it off. It is better for you to enter into life maimed, rather than having your two hands to go into Gehenna, into the unquenchable fire,
Here Jesus links the unquenchable fire to Gehenna, emphasizing the severe consequence of causing others to stumble.
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Luke 3:17
His winnowing fan is in his hand, and he will thoroughly cleanse his threshing floor, and will gather the wheat into his barn; but he will burn up the chaff with unquenchable fire.”
Luke repeats John’s warning about the winnowing fork, using the word to highlight the thoroughness of God’s cleansing work.