Etymologically

ἐνέργεια

Etymology and origin of the Ancient Greek word ἐνέργεια

Confidence
Established
Formation
Derivation
First attested
300s BC Aristotle
Ultimate origin
Proto-Indo-European *werǵ-
Etymology tree
inherited borrowed derived
Ancient Greek ἐν
Ancient Greek ἐνεργός
Ancient Greek ἐνεργής
Ancient Greek ἐνέργεια
Latin energia
French énergie
English energy
German Energie
Italian energia
From the same root
Ancient Greek ἔμπεδος ← ἐν
Ancient Greek ἔνθεος ← ἐν
English ellipsis ← ἐν
English empathy ← ἐν
English parenthesis ← ἐν

Pronunciation

  • 5th-century BC Attic: /e.nér.ɡeː.a/[1]
  • 4th-century AD Koine: /eˈner.ʝi.a/[1]
  • 10th-century Byzantine: /eˈner.ʝi.a/[1]

Forms

ἐνέργειᾰ (enérgeia) f (genitive ἐνεργείᾱς); first declension[1]

Etymology

It is formed from Ancient Greek ἐνεργής (energḗs) + -ια (-ia),[1] the adjective being a later form of ἐνεργός (energós, “active, working”).[2][1] The CGL relates it to the verb ἐνεργέω (energéō, “to be active”).[3] The adjective is formed from ἐν (en, “in”) and ἔργον (érgon, “work”).[1][4]

That noun goes back to Proto-Indo-European *wérǵom, from the root Proto-Indo-European *werǵ- (“to work”), and is cognate with Old High German werc and Old Norse verk.[5][1]

Earliest recorded meaning

The word is first common in Aristotle, whose works are the earliest texts in which GLAUx finds it.[6][2] He uses it for activity as opposed to a mere disposition (ἕξις (héxis)), and for actuality as opposed to potentiality (δύναμις (dúnamis)).[2][3]

Semantic evolution

In Aristotle's philosophy ἐνέργεια is the actual being of a thing, opposed to potentiality and to matter, and distinguished from ἐντελέχεια (entelékheia), complete reality; ἐνεργείᾳ means “actually”.[2][7] In his Rhetoric it is the vividness of a style that sets things before the eyes.[2][3]

Hellenistic writers use it for activity and vigour in general: Polybius of the vitality of a living creature and of a king's energetic action, Diodorus of the force of an engine.[2][7] Grammarians call the active force of a verb ἐνέργεια as opposed to πάθος, and Galen uses it for the function of an organ and the activity of a drug.[2] In Jewish and Christian writing, as in pagan religious texts, it is above all the working of a divine or supernatural power: the New Testament speaks of the working of God's might and of Satan.[8][2] The magical papyri speak of sacred operations, and the Hermetic writings of cosmic forces.[2]

The word lived on through the Middle Ages.[9] Late Latin borrowed it as Latin energia, and through French it became the English word energy, first used in the 1590s of force of expression.[10][4] Modern Greek ενέργεια (enérgeia) is a learned continuation, and its sense in physics is a semantic loan from French and English.[11] Babiniotis lists modern compounds such as ραδιενέργεια (radienérgeia, “radioactivity”).[4]

Timeline

  • 4th century BC – Aristotle uses it for activity and for actuality opposed to potentiality.[2][3][7]
  • 2nd century BC – Polybius uses it of the vigour of living things and of energetic action.[2][7]
  • 1st century BC – Diodorus uses it of the force of an engine.[2][7]
  • 1st century AD – The New Testament uses it of the working of God's power and of Satan.[8]
  • 2nd century AD – Galen uses it for the function of the body's organs and the activity of drugs.[2][7]
  • 1590s – English borrows it, through Late Latin and French, as energy.[10]
  • Modern Greek – ενέργεια (enérgeia) takes the scientific sense “energy” from French and English.[11]

Meanings

Noun

  1. Activity, operation, functioning, as opposed to a disposition.[2][3][7]
  2. Energy, vigour, forceful action; effective use (of weapons).[7][3]
  3. Performance or carrying out (of duties).[2][7]
  4. (philosophy) Actuality, as opposed to potentiality.[2][3]
  5. (rhetoric) Vividness of style.[2][3]
  6. (grammar) Active force or voice, as opposed to the passive.[2][7]
  7. (medicine) The function of an organ; the activity of a drug.[2]
  8. (Koine) The working of a divine or supernatural power; a magical operation; in the plural, cosmic forces.[8][2]

References

  1. ^ a b c d e f g h Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r s t Liddell, Henry George; Scott, Robert; Jones, Henry Stuart (1940), A Greek-English Lexicon, 9th ed., Oxford: Clarendon Press
  3. ^ a b c d e f g h Diggle, James, et al., eds. (2021), The Cambridge Greek Lexicon, Cambridge: Cambridge University Press
  4. ^ a b c Babiniotis, Georgios (2010), Ετυμολογικό λεξικό της νέας ελληνικής γλώσσας [Etymological Dictionary of Modern Greek], Athens: Κέντρο Λεξικολογίας
  5. ^ 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
  6. ^ Keersmaekers, Alek (2021–2025), GLAUx: The Greek Language Automated corpus, https://github.com/alekkeersmaekers/glaux
  7. ^ a b c d e f g h i j Rodríguez Adrados, Francisco, et al., eds. (1980–), Diccionario Griego-Español, Madrid: CSIC, http://dge.cchs.csic.es/xdge
  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. ^ Kriaras, Emmanuel, Επιτομή του Λεξικού της μεσαιωνικής ελληνικής δημώδους γραμματείας 1100–1669, Κέντρο Ελληνικής Γλώσσας, https://www.greek-language.gr
  10. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  11. ^ a b Ινστιτούτο Νεοελληνικών Σπουδών (Ίδρυμα Μανόλη Τριανταφυλλίδη) (1998), Λεξικό της κοινής νεοελληνικής, Thessaloniki: Aristotle University of Thessaloniki

Borrowed into

Cite this entry

“Ἐνέργεια.” Etymologically, 1 Nov. 2026, etymologically.com/grc/%E1%BC%90%CE%BD%CE%AD%CF%81%CE%B3%CE%B5%CE%B9%CE%B1. Accessed 2 Nov. 2026.

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