G0126–ἀΐδιος–aidios

For from the first making of the world, those things of God which the eye is unable to see, that is, his eternal power and existence, are fully made clear, he having given the knowledge of them through the things which he has made, so that men have no re

ἀΐδιος aidios “eternal”

And the angels who did not keep to their kingdom but went out from the place which was theirs, he has put in eternal chains and in dark night till the great day of the judging.

ἀϊδίοις aidiois “eternal”