Lasting forever; eternal (a rare or obsolete variant form with the prefix 'e-' intensifying the meaning).
From Latin prefix 'e-' (out, thoroughly) + 'eternal,' which itself comes from Latin 'aeternus.' This compound was more common in Middle English but fell out of favor as 'eternal' alone proved sufficient. The 'e-' prefix is an intensifier, like in 'elaborate' or 'enormous.'
Medieval writers loved stacking prefixes to show intensity—'eviternal' was their way of saying 'really, truly, absolutely eternal,' which is why you see it in religious texts describing heaven or divine beings. Language evolution means we just use 'eternal' now, but the impulse to intensify is still in us.
Complete word intelligence in one call. Free tier — 50 lookups/day.