ἀεργοί · ἐνεργοί

A common English gloss for ἐνέργεια (enérgeia) is actuality or activity in Aristotle’s technical sense: the correlate of δύναμις (dýnamis, potentiality). The corpus question here is earlier and narrower. What vocabulary was already doing the work of “being at work / being effective,” and where does the noun itself first sit securely?

Lemmas in the Eulogikon form index (corpus-wide frequencies at time of writing): ἐνέργεια 18,354; ἐνεργέω (energéō) 5,772; ἐνεργός (energós) 868; ἐνεργάζομαι (energázomai) 208. The hinge is not the later bulk of the noun. It is the split in the family: adjective and verb live in Hippocratic craft and medicine; the noun is absent from that corpus; Plato has none.

Hippocratic medicine: tools, winds, remedies

The positive finding is in the Hippocratic corpus (eul_aid: bww), not in Presocratic philosophy. Three works give the base vocabulary in ordinary medical and craft Greek.

On Art contrasts tools that need fire: idle when the fire is absent, at work once it is kindled.

Hippocrates and the Hippocratic Corpus, On Art, Eulogikon: bww-ce, ref. 11

ὅσαι πυρὶ δημιουργεῦνται, τούτου μὴ παρεόντος, ἀεργοί εἰσι, μετὰ δὲ τοῦ τοῦτο ἁφθῆναι ἐνεργοί.

hósai pyrì dēmiourgeûntai, toútou mḕ pareóntos, aergoí eisi, metà dè toû toûto haphthênai energoí.

Those crafts that are wrought with fire, when this is not present, are idle; but after this has been kindled, they are at work.

ἀεργοί (aergoí, idle, not-working) and ἐνεργοί (energoí, at work) are opposites in a δημιουργία (dēmiourgía, craft) image. Nothing metaphysical is in play. The tools are inactive or active according to whether fire is present.

On Ancient Medicine uses the compound verb of what wind and rumbling “work” or “bring about” in the body:

Hippocrates and the Hippocratic Corpus, On Ancient Medicine, Eulogikon: bww-at, ref. 22

Ὅσα δὲ φῦσάν τε καὶ ἀνειλήματα ἐνεργάζονται ἐν τῷ σώματι, προσήκει ἐν μὲν τοῖσι κοίλοισί τε καὶ εὐρυχώροισιν, οἷον κοιλίῃ τε καὶ θώρηκι, ψόφον τε καὶ πάταγον ἐμποιέειν.

Hósa dè phŷsán te kaì aneilḗmata energázontai en tô sṓmati, prosḗkei en mèn toîsi koíloisi te kaì euryxṓroisin, hoîon koilíēi te kaì thṓrēki, psóphon te kaì pátagon empoiéein.

And whatever winds and rumblings they produce in the body, it is fitting that in the hollow and roomy parts, such as belly and chest, they make noise and clatter.

ἐνεργάζονται (energázontai) here is physiological production: what these forces bring about inside the body. The treatise is among the earlier Hippocratic works (commonly placed in the later fifth century BCE). The verb is mundane medical Greek.

On Women uses the adjective for an effective pessary and the verb for a treatment that works:

Hippocrates and the Hippocratic Corpus, On Women, Eulogikon: bww-cb, ref. 74 (50)

Προσθετὸν ἐνεργόν· ὀπὸν μανδραγόρου καὶ κολοκύντης ἀγρίης ξὺν γάλακτι γυναικείῳ πρόσθες.

Prosthetòn energón; opòn mandragórou kaì kolokýntēs agríēs xỳn gálakti gynaikeíōi prósthes.

An effective pessary: juice of mandrake and wild gourd with woman’s milk; apply.

Hippocrates and the Hippocratic Corpus, On Women, Eulogikon: bww-cb, ref. 175

καὶ διὰ πλείονος ἐνεργεῖ.

kaì dià pleíonos energeî.

and it works over a longer time.

Hippocrates and the Hippocratic Corpus, On Women, Eulogikon: bww-cb, ref. 205

ἐνεργεῖ δὲ καὶ σκορόδου μώλυζα

energeî dè kaì skoródou mṓlyza

and a garlic clove also works

Across these passages ἐνεργόν (energón) marks efficacy and ἐνεργεῖ (energeî) marks a remedy or organ functioning. The register is craft and clinic: idle vs at-work tools, winds that produce effects, pessaries and garlic that work.

The noun ἐνέργεια does not appear in any Hippocratic work in the corpus (string search for the stem ἐνέργει across all bww-* units returns zero). The family is present as adjective and verb; the nominalisation is not yet there.

Classical rhetoric: Alcidamas

Outside medicine, Alcidamas uses the noun in a rhetorical contrast between spoken and written speech:

Alcidamas of Elaea, Odysseus, Eulogikon: dkm-aa, ref. 15 28

ὁ δὲ γεγραμμένος εἰκόνι λόγου τὴν φύσιν ὁμοίαν ἔχων ἁπάσης ἐνεργείας ἄμοιρος καθέστηκεν.

ho dè gegramménos eikóni lógou tḕn phýsin homoían échōn hapásēs energeías ámoiros kathéstēken.

But the written speech, having a nature like an image of speech, stands deprived of all activity.

ἐνέργεια here is the liveliness or active force that oral performance has and writing lacks. It is not the δύναμις / ἐνέργεια pair. The same work also uses the adjective ἐνεργόν of practice kept active. This is classical rhetoric, not Presocratic ontology.

Plato: corpus absence

A search of Plato (eul_aid: ffk) for the stem ἐνέργει returns zero units. The noun that Aristotle will make central is not in Plato’s indexed vocabulary. That absence is part of the landscape: the technical noun is not a shared Academy inheritance visible in Plato’s text.

What looks earlier and is not

Author-floruit searches for the noun before Aristotle’s floruit (-335) return hits under Anaximander, Pythagoras, Philolaus, Democritus, Empedocles, Leucippus, Metrodorus, Archytas, and others. Those hits do not survive station checks.

Archytas, Testimonies (faa-aa, ref. 22), is not independent Archytas Greek. The unit opens by citing Aristotle, Metaphysics H.2, 1043a19, and the word ἐνέργεια belongs to Aristotle’s discussion of Archytas’s style of definition. The catalogue tag attaches Aristotle’s text to Archytas.

Other early-looking noun hits sit in testimonia and fragment collections whose wording is the reporter’s (Aëtius, Simplicius, Tertullian, and similar). Ocellus of Lucania still carries an archaic floruit in the authors table (fl_from -500) for a work scholars treat as a Hellenistic pseudepigraphon. Author floruit and text-composition date are not the same field for legendary and forged attributions; taking fl_from at face value manufactures false pre-Aristotelian noun hits.

Thessalus of Cos, On the Virtues of Herbs, uses the noun in the efficacy register familiar from later medical Greek. In the present catalogue his floruit is Roman (fl_from 50). The same error pattern (legendary Cos name, imperial text) is worth remembering whenever a survey trusts attributed floruit alone.

Aristotle: the noun as load-bearing term

Aristotle is cited once here, at the cliff where the noun becomes technical. In Metaphysics Θ he sets ἐνέργεια off against τὸ δυνατόν (tò dynatón):

Aristotle, Metaphysics, Eulogikon: hgw-bj, ref. Metaph.1048b

ταύτης δὲ τῆς διαφορᾶς θατέρῳ μορίῳ ἔστω ἡ ἐνέργεια ἀφωρισμένη θατέρῳ δὲ τὸ δυνατόν.

taútēs dè tês diaphorâs thatérōi moríōi éstō hē enérgeia aphorisménē thatérōi dè tò dynatón.

Of this difference, let enérgeia be marked off on one side and the potential on the other.

That pairing is what English actuality tries to name. The passages above do not put that pairing in Hippocratic mouths. They show the craft and medical materials (at work, effective, working) from which a noun could be formed without anyone needing a philosophical pedigree for the stem.

On the evidence

• In the Hippocratic corpus the adjective ἐνεργός and the verbs ἐνεργέω / ἐνεργάζομαι are attested in craft and medical senses (idle vs at-work tools; winds that produce effects; remedies that work). The noun ἐνέργεια is not attested there.
• Alcidamas uses the noun in a rhetorical sense (liveliness of speech vs writing), not as the correlate of δύναμις.
• Plato has zero occurrences of the noun stem ἐνέργει in the indexed corpus.
• Apparent pre-Aristotelian noun hits under Presocratic author tags collapse into doxography, mis-attached Aristotelian text (Archytas faa-aa), or unreliable attributed floruits (Ocellus and similar).
• Aristotle makes the noun load-bearing opposite τὸ δυνατόν. The earlier positive evidence for the family is Hippocratic and rhetorical, not Presocratic technical philosophy.

No Hippocratic author says “this is not yet metaphysics.” The arrangement of stations does that work: efficacy of a pessary beside absence of the noun beside Plato’s silence beside doxographers putting ἐνέργεια into earlier mouths.

Caveats and open questions

Dating within the Hippocratic corpus. Individual treatises are not all of one date. On Art and On Ancient Medicine are widely treated as early; On Women is a composite gynecological collection. The claim here is secure pre-Aristotelian presence of the adjective and verb in Hippocratic Greek, not a single year for every unit.

Alcidamas and Aristotle. Alcidamas’s floruit in the catalogue runs -432 to -300 and overlaps Aristotle’s career. The Odysseus passage is classical rhetorical Greek independent of the δύναμις / ἐνέργεια technical pair; absolute priority over every Aristotelian page is not required for that point.

Floruit vs composition. For pseudepigraphic and legendary-attribution works, author fl_from / fl_to is a poor proxy for when the Greek was written. Noun surveys that sort only by author floruit will keep generating false early hits until text-composition date is distinguished in the catalogue.

Scope. This Tekmerion stops at the technical monopolization of the noun. Hellenistic school diffusion (Theophrastus, Eudemus, and related) and later medical ἐνέργεια as “efficacy of a drug” are afterlife, not developed here.

Corpus counts. Lemma frequencies and period searches reflect Eulogikon at the time of composition and may shift as the corpus grows.

Reference table

Note on Eulogikon references. A work is keyed by its wid; the display string supplies the public URL. Citation format: Author, Title, Eulogikon: wid, ref. Station checks above used eulogikon.units (sid identity) and author metadata from eulogikon.authors.