Where does “posteternity” come from?

posteternity (English) comes from English eternity, from Middle English eternyte, from Old French eternité, from Latin aeternitas, from Latin aeternus, from Latin aevum, from Latin aevom, from Old Latin aivom — vital force, life, age, eternity; day, morning.

posteternity (English): An infinite future duration, an eternity in the future

Definitions

  1. An infinite future duration, an eternity in the future

Ancestry of “posteternity”, step by step

posteternity traces back through two separate lines of ancestry.

via English eternity

StepLanguageWordMeaning
1EnglisheternityExistence without end, infinite time; Existence...
2Middle EnglisheternyteExistence without end; eternity, lasting forever;...
3Old Frencheternité—
4Latinaeternitaseternity
5Latinaeternusabiding, lasting, permanent, perpetual; eternal,...
6Latinaevumtime as a single, unified, continuous and...
7LatinaevomArchaic form of aevum
8Old Latinaivomtime, lifetime; age
9Proto-Italicaiwomage
10Proto-Indo-Europeanh₂eyu-vitality; eternal; vital force, life, long life,...
11Proto-Indo-Europeanh₂ey-vital force, life, age, eternity; day, morning

via English post

StepLanguageWordMeaning
1EnglishpostA long dowel or plank protruding from the ground;...
2Middle Frenchposte—
3Italianpostamail, post; post office; stakes
4Italianpostoplace, spot
5Latinpositusplaced; ordained
6Latinpōnōto place; to put; to lay
7Proto-Italicpoznō—
8Proto-Italicpozinō—
9Proto-Italicsinō—
Every word from Proto-Indo-European h₂ey- →Every word from Proto-Indo-European h₂eyu- →Every word from Proto-Italic aiwom →