e·ter·nal 
(ĭ-tûrnəl)
(ĭ-tûrnəl)adj.
1. Being without beginning or end: belief in an eternal creator.
2.
a. Continuing without interruption; perpetual: earned my eternal gratitude. See Synonyms at continual.
b. Seemingly endless; interminable: eternal waiting at the airport.
n.
1. Something timeless, uninterrupted, or endless: "Shall we speak of universals and eternals?" (Cynthia Ozick).
2. Eternal God. Used with the.
[Middle English, from Old French, from Late Latin aeternālis, from Latin aeternus; see aiw- in the Appendix of Indo-European roots.]
e′ter·nali·ty (ē′tər-nălĭ-tē), e·ternal·ness n.
e·ternal·ly adv.