Etymologically

Etymology and origin of the Ancient Greek word ἀέναος

Confidence
Established
Formation
Compound
First attested
800–600 BC Hesiod, Works and Days More words from the 8th century BC
Ultimate origin
Ancient Greek αἰέν,νάω

Forms

ἀέναος (aénaos), adjective of two endings (-ος, -ον); adverb ἀενάως.[1][2][3] Ionic ἀένναος (aénnaos) (Herodotus), also αἰέναος (aiénaos) (Aeschylus, a Laconian inscription) and contracted Attic ἀείνως (aeínōs) (Aristophanes, Cratinus).[3][1][2]

Etymology

It is a compound from Ancient Greek αἰέν (aién, “always”) + νάω (náō, “to flow”), so properly “ever-flowing”.[2][1][4] Babiniotis takes the first part as an old locative of αἰών (aiṓn, “age, lifetime”) and a by-form of ἀεί (aeí, “always”), and starts from a form with a double ⟨νν⟩, the one Herodotus still writes.[4][3] The Etymologicum Magnum gives the same analysis: it derives the word from the verb “to flow” and glosses it “always flowing”.[5] Beekes finds no certain cognate of the verb νάω (náō) outside Greek.[6]

Earliest recorded meaning

Its first use is in Hesiod's Works and Days (595), of “an ever-flowing spring that runs off and is clear”.[3][1][4]

Semantic evolution

In archaic and classical poetry and prose it describes running water: rivers in Hesiod and Aeschylus, a lake in Herodotus, clouds in Aristophanes' Clouds, and even fire in Pindar.[1][3][2] In the Frogs Aristophanes uses the contracted form comically, of an “ever-flowing” stream of mud and dung in the underworld.[1][3]

From the start it was also figurative: Simonides and Heraclitus use it of everlasting glory, Pindar of the unfailing tables of public hospitality, Euripides of unending power and Xenophon of an inexhaustible supply of food.[1][3][2] Philosophers used it for what lasts for ever: Plato of being, and later writers of nature and of motion.[3]

In the Septuagint it renders the “everlasting hills” of Genesis and calls God eternal in Job; the Wisdom of Solomon keeps the literal “ever-flowing spring”.[7] The First Letter of Clement speaks of the everlasting order of the universe, and Hellenistic and Byzantine papyri and inscriptions call God “eternal”; in legal papyri the phrase “for the everlasting time” means in perpetuity.[8][3]

Modern Greek keeps it as the learned Modern Greek αέναος (aénaos), “perpetual, unceasing”, as in the perpetual cycle of life.[9][4]

Timeline

  • Before the 6th century BC – Hesiod calls a spring “ever-flowing” in the Works and Days.[3][1]
  • 6th–5th century BC – Pindar uses it of fire, and Simonides and Heraclitus of everlasting glory.[1][3]
  • 5th century BC – Herodotus writes the Ionic form ἀένναος (aénnaos) of a lake.[3][1]
  • 5th–4th century BC – Plato applies it to being, in the Laws.[3]
  • 2nd century BC – A papyrus uses the phrase “for the everlasting time” for a grant in perpetuity.[3][8]
  • 6th century AD – A papyrus calls God “the eternal Saviour”.[3]
  • Modern Greek – The word survives as the learned αέναος (aénaos), “perpetual”.[9][4]

Meanings

Adjective

  1. Of springs and rivers: ever-flowing, never running dry.[1][2][3]
  2. (figurative) inexhaustible, unfailing, of power, food or hospitality.[3][2]
  3. everlasting, eternal, of glory, life, being or God.[1][3][8]

References

  1. ^ a b c d e f g h i j k l Liddell, Henry George; Scott, Robert; Jones, Henry Stuart (1940), A Greek-English Lexicon, 9th ed., Oxford: Clarendon Press
  2. ^ a b c d e f g Diggle, James, et al., eds. (2021), The Cambridge Greek Lexicon, Cambridge: Cambridge University Press
  3. ^ a b c d e f g h i j k l m n o p q r Rodríguez Adrados, Francisco, et al., eds. (1980–), Diccionario Griego-Español, Madrid: CSIC, http://dge.cchs.csic.es/xdge
  4. ^ a b c d e Babiniotis, Georgios (2010), Ετυμολογικό λεξικό της νέας ελληνικής γλώσσας [Etymological Dictionary of Modern Greek], Athens: Κέντρο Λεξικολογίας
  5. ^ Gaisford, Thomas, ed. (1848), Etymologicum Magnum, Oxford: Oxford University Press
  6. ^ Beekes, Robert S. P. (2010), Etymological Dictionary of Greek, with the assistance of Lucien van Beek, Leiden Indo-European Etymological Dictionary Series 10, Leiden; Boston: Brill
  7. ^ Lust, Johan; Eynikel, Erik; Hauspie, Katrin (2003), Greek-English Lexicon of the Septuagint, rev. ed., Stuttgart: Deutsche Bibelgesellschaft
  8. ^ a b c Bauer, Walter; Danker, Frederick W., et al. (2000), A Greek-English Lexicon of the New Testament and Other Early Christian Literature, 3rd ed., Chicago: University of Chicago Press
  9. ^ a b Ινστιτούτο Νεοελληνικών Σπουδών (Ίδρυμα Μανόλη Τριανταφυλλίδη) (1998), Λεξικό της κοινής νεοελληνικής, Thessaloniki: Aristotle University of Thessaloniki
Cite this entry

“Ἀέναος.” Etymologically, 13 Nov. 2026, etymologically.com/grc/%E1%BC%80%CE%AD%CE%BD%CE%B1%CE%BF%CF%82. Accessed 13 Nov. 2026.

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