Etymologically

ἐνθουσιάζω

Etymology and origin of the Ancient Greek word ἐνθουσιάζω

Confidence
Established
Formation
Derivation
First attested
6th–5th century BC, Aeschylus
Ultimate origin
Ancient Greek ἔνθεος
From the same root
English enthusiasm ← ἐνθουσιάζω

Forms

ἐνθουσιάζω (enthousiázō) [1]

Etymology

It is formed from Ancient Greek ἔνθους (énthous) + -ιάζω (-iázō),[1] from the contracted form of ἔνθεος (éntheos, “possessed by a god”), literally “having a god within”.[2][1] Beekes explains the ending by the influence of the verbs in -σιάζω (-siázō), like θυσιάζω (thusiázō), and of the verbs of illness in -ιάω (-iáō);[2] Wiktionary adds the influence of οὐσία (ousía).[1] The contraction of ⟨εο⟩ to ⟨ου⟩ is regular.[2]

Earliest recorded meaning

Its first recorded use is in a fragment of Aeschylus, in the form ἐνθουσιάω (enthousiáō), where a house is filled with divine frenzy.[3] Tragedy always uses that form.[3]

Semantic evolution

Plato made it a key word of his account of inspiration: the reciter of Homer, poets and lovers are possessed by a god, and in the Phaedrus the speaker fears being possessed by the nymphs.[3][4][5] In Euripides it means to be beside oneself through one's own sufferings.[5][3] Aristotle says that a style can make the listeners feel inspired, and Plutarch uses it of passionate enthusiasm for philosophy.[3][5] Plotinus applies it to the ecstasy of mystical union.[4] Its nouns were ἐνθουσιασμός (enthousiasmós) and ἐνθουσίασις (enthousíasis).[6][3]

Modern Greek ενθουσιάζω (enthousiázo) is a learned form of the ancient verb, which took the senses of “to fill with enthusiasm” and “to be enthusiastic” under the influence of ενθουσιασμός (enthousiasmós) and of French s'enthousiasmer.[7]

Timeline

  • 6th–5th century BC – Aeschylus has the form ἐνθουσιάω.[3][4]
  • 5th century BC – Euripides uses it of being beside oneself with suffering.[3][5][4]
  • 5th–4th century BC – Plato uses it for the divine possession of poets and seers.[3][4]
  • 4th century BC – Aristotle uses it of the effect of a style on the listeners.[3][4]
  • 3rd century AD – Plotinus uses it for mystical ecstasy.[4]
  • Modern Greek – ενθουσιάζω means “to fill with enthusiasm”.[7]

Meanings

Verb

  1. To be possessed or inspired by a god, to be in ecstasy.[5][3]
  2. To be out of one's mind, through suffering.[5][3]
  3. To be enraptured; to be passionately enthusiastic about something.[5][3]
  4. (transitive, late) To inspire a feeling in someone.[3]

Word family

  • ἔνθεος (éntheos)
  • θεός (theós)

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c 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
  3. ^ a b c d e f g h i j k l m n Liddell, Henry George; Scott, Robert; Jones, Henry Stuart (1940), A Greek-English Lexicon, 9th ed., Oxford: Clarendon Press
  4. ^ a b c d e f g Rodríguez Adrados, Francisco, et al., eds. (1980–), Diccionario Griego-Español, Madrid: CSIC, http://dge.cchs.csic.es/xdge
  5. ^ a b c d e f g Diggle, James, et al., eds. (2021), The Cambridge Greek Lexicon, Cambridge: Cambridge University Press
  6. ^ Chantraine, Pierre (2009), Dictionnaire étymologique de la langue grecque: histoire des mots, new ed. with a supplement (Chroniques d'étymologie grecque 1–10), Paris: Klincksieck
  7. ^ a b Ινστιτούτο Νεοελληνικών Σπουδών (Ίδρυμα Μανόλη Τριανταφυλλίδη) (1998), Λεξικό της κοινής νεοελληνικής, Thessaloniki: Aristotle University of Thessaloniki

Descendants

Cite this entry

“Ἐνθουσιάζω.” Etymologically, 24 Oct. 2026, etymologically.com/grc/%E1%BC%90%CE%BD%CE%B8%CE%BF%CF%85%CF%83%CE%B9%CE%AC%CE%B6%CF%89. Accessed 24 Oct. 2026.

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