Etymologically

Etymology and origin of the Ancient Greek word ἄγνοια

Confidence
Established
Formation
Derivation
First attested
600–400 BC Aeschylus More words from the 6th century BC
Ultimate origin
Ancient Greek γιγνώσκω
Etymology tree
inherited borrowed derived
Ancient Greek γιγνώσκω (gignṓskō)
Ancient Greek ἄγνοια (ágnoia)
From the same root
Ancient Greek γνώμη (gnṓmē) ← γιγνώσκω
Ancient Greek γνώμων (gnṓmōn) ← γιγνώσκω
Ancient Greek γνώριμος (gnṓrimos) ← γιγνώσκω
Ancient Greek διαγιγνώσκω (diagignṓskein) ← γιγνώσκω
Ancient Greek προγιγνώσκω (progignṓskein) ← γιγνώσκω

Pronunciation

  • 5th-century BC Attic: /á.ɡnoi̯.a/[1]
  • 4th-century AD Koine: /ˈa.ɣny.a/[1]
  • 10th-century Byzantine: /ˈa.ɣny.a/[1]

Forms

ᾰ̓́γνοιᾰ (ágnoia) f (genitive ᾰ̓γνοίᾱς); first declension[1] Also ἀγνοίᾱ in Sophocles, Ionic ἀγνοίη.[2][3]

Etymology

It is from Ancient Greek ἀ- (a-, “not”) + γιγνώσκω (gignṓskō, “to know”) + -ία (-íā), an abstract noun of not knowing.[1][4][3]

Earliest recorded meaning

It is first found in Aeschylus: in the Agamemnon Thyestes eats of the cannibal feast “in ignorance”, and in the Suppliants a man may kill a friend through ignorance.[4][3]

Semantic evolution

In tragedy it could mean failing to recognize a person, and Sophocles has a woman “whom you see but pretend not to know”.[2][4][3] Thucydides, Xenophon and the orators use it for ignorance of facts that leads to error, and Demosthenes and Polybius for a mistake itself.[4][2][3] In philosophy Plato and Aristotle set it against ἐπιστήμη (epistḗmē, “knowledge”),[4] Plato calls it an emptiness of the soul.[4] Menander brings Ignorance on stage as a deity, and Diphilus and Machon wrote comedies with this title.[2][3]

In the Septuagint and the New Testament it is ignorance of God, or a fault committed unknowingly, almost a sin: in Acts Peter tells the people that they acted against Jesus in ignorance.[5][3] Modern Greek has it as a learned word, Modern Greek άγνοια (ágnia).[6]

Timeline

  • 6th–5th century BC – Aeschylus uses it of acting without knowing.[4][3]
  • 5th century BC – Sophocles uses it of failing to recognize someone, and Thucydides of ignorance of facts.[2][4]
  • 5th–4th century BC – Plato opposes it to knowledge.[4]
  • 4th century BC – Demosthenes uses it for a mistake.[2][3]
  • 4th–3rd century BC – Menander brings Ignorance on stage as a deity.[2][3]
  • 1st century AD – The Acts of the Apostles uses it of those who acted against Jesus unknowingly.[5]

Meanings

Noun

  1. Failure to recognize a person or thing.[2][4]
  2. Ignorance, lack of knowledge or understanding; misconception; in the dative and with prepositions, unknowingly, by inadvertence.[4][2][3]
  3. A mistake, an error of conduct.[2][3]
  4. (personified) Ignorance as a deity.[2][3]
  5. (Septuagint, New Testament) Ignorance of God; a fault committed unknowingly.[5]

Usage notes

Hesychius glosses it with ἀγνωσία (agnōsía) and “lack of learning”, and Photius with “neglect”.[7][8]

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k 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 Rodríguez Adrados, Francisco, et al., eds. (1980–), Diccionario Griego-Español, Madrid: CSIC, http://dge.cchs.csic.es/xdge
  4. ^ a b c d e f g h i j k Liddell, Henry George; Scott, Robert; Jones, Henry Stuart (1940), A Greek-English Lexicon, 9th ed., Oxford: Clarendon Press
  5. ^ 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
  6. ^ Ινστιτούτο Νεοελληνικών Σπουδών (Ίδρυμα Μανόλη Τριανταφυλλίδη) (1998), Λεξικό της κοινής νεοελληνικής, Thessaloniki: Aristotle University of Thessaloniki
  7. ^ Hesychius of Alexandria, Lexicon, ed. Kurt Latte (Α–Ο, Copenhagen 1953–1966) and Moritz Schmidt (Π–Ω, Jena 1858–1868)
  8. ^ Photius, Lexicon, ed. Christos Theodoridis, vol. 1 (Α–Δ) (Berlin: De Gruyter, 1982); ed. Richard Porson (Cambridge, 1822)
Cite this entry

“Ἄγνοια.” Etymologically, 13 Nov. 2026, etymologically.com/grc/%E1%BC%84%CE%B3%CE%BD%CE%BF%CE%B9%CE%B1. Accessed 14 Nov. 2026.

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