Greek word
ásbestos
ἄσβεστος
What it means
not extinguished, i.e. perpetual
not extinguished, i.e. (by implication) perpetual
Where it comes from
from A (Α) (as a negative particle) and a derivative of sbénnymi (σβέννυμι)
How the King James translates it
Every place it appears 1
Matthew3:12