Etymology and origin of the Latin word intus
- Confidence
- Established
- Formation
- Inherited
- First attested
- c. 250–184 BC, Plautus
- Inherited from
- Proto-Italic *entos
- Ultimate origin
- Proto-Indo-European (*h₁entós)
Forms
intus (not comparable)[1]
Etymology
It is inherited from Proto-Italic *entos (“inside”), inherited from Proto-Indo-European *h₁entós (“(from) inside”), formed from the root of in (“in”).[2][3] The OLD and Wiktionary analyse it as the preposition with the adverb ending -tus.[4][1] Cognate with Ancient Greek ἐντός (entós, “within”).[4][1][5]
Earliest recorded meaning
De Vaan dates it from Plautus,[2] who has ecquis alius Sōsia intust quī meī similis siet?, “is there another Sosia inside who looks like me?”.[4] Ennius has lātē specus intus patēbat, “inside, the cave opened wide”.[4][3]
Semantic evolution
Intus is “inside, within” (Caesar: with the enemy inside and outside), “at home, indoors”, “within the town”, “in the interior” of a country (Varro), and “inside the body” (Cato).[4][5][1] In early Latin it also means “from within” (Plautus: intus pateram prōfertō forās, “bring the bowl out from inside”), and in Lucretius and later “inwards”, a use later grammarians rejected in favour of intrō.[4][1] Figuratively it is “in the mind, privately”, and intus canere, “to sing to oneself”, became a byword for self-interest (Cicero).[4] Apuleius uses it as a preposition with the genitive, after Greek ἐντός.[4]
Church Latin glosses it “within, inside, inwardly”.[6]
Timeline
- c. 250–184 BC – Plautus: ecquis alius Sōsia intust?.[4][3]
- 204–169 BC – Ennius: lātē specus intus patēbat.[4][3]
- 96–55 BC – Lucretius uses it for “inwards”.[4][3]
- c. 125–175 AD – Apuleius: intus aedium.[4][3]
Meanings
Adverb
- inside, within; at home, indoors.[4][5][1][6]
- In the interior (of a country); internally.[4]
- (early Latin) From within.[4][1]
- Inwards, to the inside.[4][1]
- In the mind, privately; inwardly.[4][6]
Preposition
Word family
- deintus
- intestīnus
Related words
Usage notes
Isidore of Seville says that the ancients called the anvil intus rather than incūs, because metal is beaten on it (intundere).[7][3]
References
- ^ a b c d e f g h i j k Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ 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
- ^ a b c d e f g Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b c d e f g h i j k l m n o p q r Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ a b c Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
- ^ Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
Related etymologies
Cite this entry
“Intus.” Etymologically, 18 Oct. 2026, etymologically.com/la/intus. Accessed 18 Oct. 2026.
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