- eon (n.)
- 1640s, from Late Latin aeon, from Greek aion "age, vital force; a period of existence, a lifetime, a generation; a long space of time," in plural, "eternity," from PIE root *aiw- "vital force, life, long life, eternity" (source also of Sanskrit ayu "life," Avestan ayu "age," Latin aevum "space of time, eternity," Gothic aiws "age, eternity," Old Norse ævi "lifetime," German ewig "everlasting," Old English a "ever, always"). Related: Eonian; eonic.
