eonian

Adjective

• continuing forever or indefinitely
  • the ageless themes of love and revenge
    
  • eternal truths
    
  • life everlasting
    
  • hell's perpetual fires
    
  • the unending bliss of heaven
    

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

Related words

• Synonyms: 
  ageless , aeonian , eternal , everlasting , perpetual , unending , unceasing