Etymograph

English

protagon

Protagon comes from Ancient Greek ἀγών ‘a contest’, from ᾰ̓́γω ‘to lead’, and ultimately from Proto-Indo-European *h₂eǵ- ‘to drive’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*h₂eǵ-1‘to drive’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*h₂éǵeti1‘to be driving’reconstructed
  3. Proto-Hellenicc. 2200–1600 BCE*ágō1‘to lead, to guide’reconstructed
  4. Ancient Greekc. 800–300 BCEᾰ̓́γω2ắgō‘to lead’
  5. Ancient Greekc. 800–300 BCEἀγών3agṓn‘a contest’
  6. Englishtodayprotagon3

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Ancient Greek ἄγω
  2. 2 Wiktionary, Ancient Greek ἀγών, which cites Beekes
  3. 3 Wiktionary, English protagon

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*h₂eǵ-Wiktionary, Ancient Greek ἄγω‘to drive’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*h₂éǵetiWiktionary, Ancient Greek ἄγω‘to be driving’reconstructed
  3. Proto-Hellenicc. 2200–1600 BCE*ágōWiktionary, Ancient Greek ἄγω‘to lead, to guide’reconstructed
  4. Ancient Greekc. 800–300 BCEᾰ̓́γωWiktionary, Ancient Greek ἀγών, which cites Beekesắgō‘to lead’
  5. Ancient Greekc. 800–300 BCEἀγώνWiktionary, English protagonagṓn‘a contest’
  6. EnglishtodayprotagonWiktionary, English protagon

The story

So called because it was the first definitely ascertained principle of the brain.

Full etymology on Wiktionary

Linked words

through Proto-Indo-European *h₂eǵ- ‘to drive’

suggest, register, reaction, actively, essay, transaction, acre, gesture, radioactive, digest, inactive, congestion, belligerent, agrarian, unambiguous, hyperactivity, ingest, retroactive, reagent, gestation, progesterone, ambiguously, samaj, agitate, agger, gerund, gestion, 128 more

through Proto-Indo-European *h₂éǵeti ‘to be driving’

act, action, active, activity, actual, agency, actor, agent, agenda, activate, ambiguous, squat, ambiguity, assay, agile, agility, radium, actuator, agitation, cogent, axiomatic, actuation, inexact, exigent, actuate, 110 more

through Proto-Hellenic *ágō ‘to lead, to guide’

strategy, axiom, stratagem, glucagon, 22 more

through Ancient Greek ἀγών ‘a contest’

agony, antagonist, agonist, antagonism, antagonize, agonize, 7 more

Today it means

noun A supposed crystalline molecule that forms the brain. The idea was proposed by Matthias Eugen Oscar Liebreich and Johann Ludwig Wilhelm Thudichum later disproved it, showing that the brain contains various lipids.

Sources

Sources: Wiktionary, “protagon”; the older steps come from the Wiktionary entries for Ancient Greek ἄγω, Ancient Greek ἀγών. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Proto-Indo-European *h₂eǵ- / protagon

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