of or relating to a geological eon (longer than an era)
Synonym(s):eonian, 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" Synonym(s):ageless, aeonian, eonian, eternal, everlasting, perpetual, unending, unceasing