éphémère (French)

Where does "éphémère" come from?

The French adjective 'éphémère' is inherited from Old French 'effimere'[1], which was ultimately drawn from Ancient Greek 'ἐφήμερος'[1] ('ephḗmeros'). This Greek source is a compound built from 'ἐπ(í)-'[2] ('ep(í)-', meaning 'on') and 'ἡμέρᾱ'[2] ('hēmérā', meaning 'day'). The term traces further back through Proto-Hellenic and into Proto-Indo-European roots denoting heat and location[4][6].

Open questions

The initial aspiration in the Greek word for day is likely by analogy with the word for evening. [3]
The Proto-Indo-European locative form may derive from a root meaning back, with the on sense referring to riding or pack animals. [5]

Full etymology tree

éphémère (French), 'ephemeral (lasting for only a short time; transitory)'
- inherited effimere (Old French), 'ephemeral'
  - borrowed ἐφήμερος (ephḗmeros) (Ancient Greek), 'living only one day; short-lived'
    - compound ἐπ(ί)- (ep(í)-) (Ancient Greek)
      - inherited *epí (Proto-Hellenic)
        inherited *h₁epi (Proto-Indo-European), 'on, at, near'
        derived *h₁eps (Proto-Indo-European)
        derived *h₁ep- (Proto-Indo-European), 'to grab, snatch, get'
        derived *h₁epder. (Proto-Indo-European)
        derived *h₁epsder. (Proto-Indo-European)
    - compound ἡμέρα (heméra) (Ancient Greek), 'day'
      - derived ἦμαρ (êmar) (Ancient Greek), 'day'
        inherited *ā́mər (Proto-Hellenic), 'day'
        inherited *Héh₂mr̥ ~ *Héh₂mōr (Proto-Indo-European)
      - influenced by ἑσπέρα (hespéra) (Ancient Greek), 'evening'

Ancestors

effimere (Old French)
ἐφήμερος (Ancient Greek)

Descendants and derived words

efemer (Romanian)

Sources

Updated September 2026

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Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris