PIE base ‘vital force, life, long life, eternity; also ‘endowed with the acme of vital force, young’. See also gʷei- ‘life’.
Other derivatives include ever, every, age, Greek aiōn ‘age, vital force’, and ayurveda, from Sanskrit āyuḥ ‘life, health’.
[Pokorny aiu̯-, ai̯u-, pp. 17–18.]
The Eternal is Transfinite, transcending the divisions of time in its vertical dimension. The Eternal Now thus begins and ends in the Absolute, as the union of the Alpha and Omega Points of evolution and involution, as Oneness and Wholeness, directly experienced as the Immortal Ground of Being.