eternal

Adjective

• tiresomely long; seemingly without end
  • endless debates
    
  • an endless conversation
    
  • the wait seemed eternal
    
  • eternal quarreling
    
  • an interminable sermon
    

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

Related words

• Synonyms: 
  endless , interminable , ageless , aeonian , eonian , everlasting , perpetual , unending , unceasing