Aionios is used twice in Matthew 25:46. Once to describe 'everlasting punishment' (
αἰώνιος aiōnios κόλασις kolasis); and again to describe life eternal (ζωή
zōē
αἰώνιος aiōnios). If you are operating from a different lexicon let me know.
Stongs G166 aionios:
Genesis Chapter 1 (KJV)
Even the Latin Vulgate gets it right:
et ibunt hii in supplicium aeternum iusti autem in vitam aeternam
Strongs G166 aionios:
The KJV translates Strong's G166 in the following manner: eternal (42x),
everlasting (25x),
the world began (with G5550) (2x),
since the world began (with G5550) (1x),
for ever (1x).
Outline of Biblical Usage
- without beginning and end, that which always has been and always will be
- without beginning
- without end, never to cease, everlasting
A few points. First is if we go by your definition, our eternal life with God is 'an indeterminate period of time.' That sure changes a lot of Christian teachings and even apostolic teaching in the NT. Where we see 'eternal' life in 1 John 5:20 I'm guessing it is not an 'indeterminate period of time.' It really means eternal. I mean the Apostle John used the same word
aionios.
Secondly, trying to wrest a root of a word is not how we exegete as the NT writers did not use the root but the actual word. I see this approach as begging the question, as we have ample evidence of
aionios used throughout the NT which there is absolutely no debate the meaning is 'eternal' or 'everlasting.'
Finally, we can check the OT too. I quoted Daniel 12:2. The English used there for everlasting life and everlasting contempt is again the same word
owlam. Again, the lexicon lines up with 'everlasting.'
The KJV translates Strong's H5769 in the following manner: ever (272x),
everlasting (63x),
old (22x),
perpetual (22x),
evermore (15x),
never (13x),
time (6x),
ancient (5x),
world (4x),
always (3x),
alway (2x),
long (2x),
more (2x),
never (with H408) (2x),
miscellaneous (6x).
long duration, antiquity, futurity, for ever, ever, everlasting, evermore, perpetual, old, ancient, world
- ancient time, long time (of past)
- (of future)
- for ever, always
- continuous existence, perpetual
- everlasting, indefinite or unending future, eternity
Owlam H5769:
Genesis Chapter 1 (KJV)