English
eternality
From eternal + -ity.
Formed from eternal + -ity
Proto-Indo-European *h₂eyu- ‘long time, lifetime’
…
Latin aeternus
Late Latin aeternālis ‘eternal, everlasting, temporally infinite’
Old French eternal
Middle English eternal ‘Eternal, permanent’
English eternal
Today it means
noun The condition of being eternal; endlessness
Language periods are conventional ranges, not dates for this word.
Etymograph / eternality