Etymology and origin of the Latin word sextus
- Confidence
- Established
- Formation
- Inherited
- First attested
- c. 250–184 BC, Plautus
- Inherited from
- Proto-Italic *sekstos
- Ultimate origin
- Proto-Indo-European (*(s)weḱs)
Forms
sextus (feminine sexta, neuter sextum); first/second-declension numeral[1]
Etymology
It is inherited from Proto-Italic *sekstos (“sixth”), formed from *seks (“six”), the source of sex (“six”).[2][1][3] De Vaan derives the numeral from Proto-Indo-European *(s)weḱs (“six”) and the ordinal from ⟨*uks-ó-⟩, while Wiktionary reconstructs ⟨*swéḱstos⟩;[2][1] Proto-Italic lost the /w/ of ⟨*sweks⟩ by analogy with ⟨*septm⟩ “seven”.[2][1] A Venetic name ⟨segtio⟩ “Sextiō” continues the same ordinal.[2] Cognate with Ancient Greek ἕξ (héx, “six”), Gothic 𐍃𐌰𐌹𐌷𐍃 (saihs, “six”) and Lithuanian šešì (“six”).[2]
Earliest recorded meaning
Plautus is its first author,[4] with hoc est sextum ā portā proxumum angiportum, “this is the sixth alley from the gate” in the Pseudolus.[3]
Semantic evolution
It is the ordinal “sixth”, as Ovid's “the sixth milestone from the city”, and with decimus forms “sixteenth”.[3][5] Sexta pars, or the feminine alone, is a sixth part, as Cicero's sixth of an inheritance.[3] Statius uses bis sextus for twelve, of a consul's lictors.[3]
Church Latin has sextum, “for the sixth time”.[6] Köbler records it in early medieval laws and charters.[4]
Timeline
- c. 250–184 BC – Plautus of the sixth alley.[3][4]
- 81–43 BC – Cicero of a sixth of an inheritance.[3][4]
- c. 45–96 AD – Statius has bis sextus for twelve.[3][4]
Meanings
Numeral
- Sixth;[3][5][1] sextus decimus, sixteenth.[3][5][1]
- sexta pars (or sexta): a sixth part.[3]
- sextum: for the sixth time.[6]
Word family
- bisextus
- sexta
- sextadecimānī
- sextaneus
- sextānī
- sexticeps
- sextīlis
Related words
- sex
- sēnī
- sexāgintā
- sextārius
Usage notes
The praenomen Sextus, abbreviated Sex., is a separate entry in the OLD.[3][5] Wiktionary suggests it referred first to the month of birth, Sextīlis, rather than to the order of birth.[1]
References
- ^ a b c d e f g h i Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e 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 h i j k l Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ a b Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
Related etymologies
Cite this entry
“Sextus.” Etymologically, 19 Oct. 2026, etymologically.com/la/sextus. Accessed 19 Oct. 2026.
Last edited on . ·