aeonian

adjectives

of or relating to a geological eon (longer than an era)

aeonian, eonian

is derived from

pertains to

continuing forever or indefinitely

"the ageless themes of love and revenge"; "eternal truths"; "life everlasting"; "hell's perpetual fires"; "the unending bliss of heaven"

aeonian, ageless, eonian, eternal, everlasting, perpetual, unceasing, unending