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adeo

Etymology and origin of the Latin word adeo

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adeo1 go to, approach

Confidence
Established
Formation
Compound
First attested
Plautus
Ultimate origin
Proto-Indo-European (*h₁ey-)

Pronunciation

  • IPA (Classical): [ˈa.de.oː][1]
  • IPA (Ecclesiastical): [ˈaː.de.o][1]

Forms

adeō (present infinitive adīre, perfect active adiī or adīvī, supine aditum); irregular conjugation[1] Inscriptions have adiese for adiisse and adeitur, and Apuleius has the perfect adiuit, and Ennius the archaic infinitive adirier.[2][3]

Etymology

The verb is from Latin ad- (“to”) + eō (“to go”).[2][1] De Vaan traces ⟨eō⟩ to Proto-Italic *ei- (“to go”), from Proto-Indo-European *h₁ey- (“to go”).[4]

Earliest recorded meaning

The OLD's earliest citations include Plautus and Ennius, of approaching a person or place.[2] Köbler dates Plautus c. 250–184 BC and Ennius 204–169 BC.[5]

Semantic evolution

It meant to come or go near, approach a person or place, as in Ennius, Cicero and Caesar; of things to reach, penetrate; to approach with hostile intent, attack, as in Caesar and Sallust; to go to, visit, accost someone for a purpose, and of a commander to inspect; to go to for help, appeal to, consult an oracle, as in Virgil and Livy; to go to law, as in Cicero; and to approach a god as a worshipper.[2]

Figuratively it meant to apply oneself to, take up, begin, ad rem pūblicam adīre “to go into politics”, to enter upon an inheritance, as in Cicero and Gaius, and to meet, undergo, submit to danger, as in Terence and Cicero.[2] manum adīre meant to cheat.[2]

In Ecclesiastical Latin it meant to go to, approach, undertake.[6] Italian adire and Spanish adir are borrowed from it.[1]

Timeline

  • c. 250–184 BC – Plautus uses it of visiting.[2][5]
  • 190–159 BC – Terence uses it of facing danger.[2][5]
  • 81–43 BC – Cicero uses it of going to law.[2][5]
  • c. 50 BC – Caesar uses it of attacking.[2][5]

Meanings

Verb

  1. To come or go near, approach.[2]
  2. To approach with hostile intent, attack.[2]
  3. To go to, visit, accost.[2]
  4. To go to for help, appeal to; to consult (an oracle).[2]
  5. To go to law; to approach (a god) in worship.[2]
  6. To take up, begin; to enter upon (an inheritance).[2]
  7. To meet, undergo (danger).[2]

Word family

  • aditus
  • aditiō
  • adibilis

adeo2 so far, so much (adverb)

Confidence
Established
Formation
Derivation
First attested
Plautus
Ultimate origin
Proto-Indo-European (*(h₁)i-)

Pronunciation

  • IPA (Classical): [ˈa.de.oː][1]
  • IPA (Ecclesiastical): [ˈaː.de.o][1]

Forms

adeō (not comparable)[1] An inscription has adeo spelled uteo.[2]

Etymology

The adverb is from ad- “to” and eō “there, to that point”, the ablative of the pronoun is.[2][1][5] De Vaan traces ⟨is⟩ to Proto-Indo-European *(h₁)i- (“he, she, it”).[4] Festus held that it should be accented ⟨adéo⟩, unlike the verb, a distinction Lewis & Short call merely theoretical.[3]

Earliest recorded meaning

The OLD's earliest citations are from Naevius and Plautus.[2] Köbler dates Plautus c. 250–184 BC.[5]

Semantic evolution

In space it meant to the point or place where, as in Cato's usque adeō quō “up to the point where”; in time, with dum or dōnec, up to the time when, so long as; and to the end that.[2][7] In degree it meant to such an extent, so very, so much, especially with ut, as in Plautus and Cicero, nōn adeō not so much, and adeō nōn … ut so far from; it introduced an explanation, so true is it that; and it meant moreover, besides, or for that matter.[2] After a negative, in Tacitus, it meant all the more, adeō nōn much less; and as an emphatic particle, especially after nunc or iam, it meant indeed, just, precisely.[2]

In Ecclesiastical Latin it meant even, so much, to that point, inasmuch as.[6] Medieval Latin used it for very much, and British Medieval Latin for so, so much that, and with a negative not very.[8][9]

Timeline

  • c. 235–200 BC – Naevius uses it.[2][5]
  • c. 250–184 BC – Plautus uses it of degree.[2][5]
  • 234–149 BC – Cato uses it of place.[2][5]
  • 98–115 AD – Tacitus uses adeō nōn “much less”.[2][5]

Meanings

Adverb

  1. To the point or place where; up to the time when.[2]
  2. To such an extent, so very, nōn adeō, not so much.[2]
  3. So true is it that; moreover, besides.[2]
  4. All the more, adeō nōn, much less.[2]
  5. Indeed, just, precisely (giving emphasis).[2]

References

  1. ^ a b c d e f g h i 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 u v w x y z 27 28 29 30 31 32 Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  4. ^ a b de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  5. ^ a b c d e f g h i j k Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ a b Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
  7. ^ Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  8. ^ Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  9. ^ Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
Cite this entry

“Adeo.” Etymologically, 17 Oct. 2026, etymologically.com/la/adeo. Accessed 17 Oct. 2026.

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