ἀΐδιος G126
aḯdios · ah-id'-ee-os · Adjective
from ἀεί; everduring (forward and backward, or forward only):--eternal, everlasting.
2 Occurrences in the King James Bible
Romans 1:20For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:
Jude 1:6And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.