eonian

adj

1. continuing forever or indefinitely
   1. the ageless themes of love and revenge
   2. eternal truths
   3. life everlasting
   4. hell's perpetual fires
   5. the unending bliss of heaven

   Synonym:    agelessaeonianeternaleverlastingperpetualunendingunceasing

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

   Synonym:    aeonian