Aeonian

aeonian, eonian [iːˈəʊnɪən]
adj Literary
everlasting

Adj. 1. aeonian - of or relating to a geological eon (longer than an era)
eonian
2. aeonian - continuing forever or indefinitely; "the ageless themes of love and revenge"; "eternal truths"; "life everlasting"; "hell's perpetual fires"; "the unending bliss of heaven"
eternal, everlasting, perpetual, unceasing, unending, ageless, eonian
lasting, permanent - continuing or enduring without marked change in status or condition or place; "permanent secretary to the president"; "permanent address"; "literature of permanent value"