From Middle English eternal, from Old French eternal, from Late Latin aeternālis, from Latin aeternus, from aevum.

• (RP) IPA: /ɪˈtɜː.nəl/
• (America) IPA: /ɪˈtɝ.nəl/, /iˈtɝ.nəl/

eternal

1. Lasting forever; unending.

   Synonyms: agelong, endless, everlasting, permanent, sempiternal, unending, Thesaurus:eternal

   Antonyms: ephemeral, momentary, transient, Thesaurus:ephemeral

2. (philosophy) Existing outside time; as opposed to sempiternal, existing within time but everlastingly.

   Synonyms: timeless, atemporal, Thesaurus:timeless

3. (hyperbolic) Constant; perpetual; ceaseless; ever-present.
   • 1912, Arthur Conan Doyle, The Lost World […], London; New York, N.Y.: Hodder and Stoughton, →OCLC ↗:

     Beneath him you might have seen the three of us - myself, sunburnt, young, and vigorous after our open-air tramp; Summerlee, solemn but still critical, behind his eternal pipe; Lord John, as keen as a razor-edge, with his supple, alert figure leaning upon his rifle, and his eager eyes fixed eagerly upon the speaker.

4. (dated) Exceedingly great or bad; used as an intensifier.

   Synonyms: awful

   some eternal villain

• French: éternel
• German: ewig
• Italian: eterno
• Portuguese: eterno
• Russian: ве́чный
• Spanish: eterno, eternal

eternal (plural eternals)

1. One who lives forever; an immortal.