Etymologically

pecus

Etymology and origin of the Latin word pecus

pecus1 livestock

Confidence
Established
Formation
Inherited
First attested
Livius Andronicus
Inherited from
Proto-Italic *pekos
Ultimate origin
Proto-Indo-European (*péḱos)

Pronunciation

  • IPA (Classical): [ˈpɛ.kʊs][1]
  • IPA (Ecclesiastical): [ˈpɛː.kus][1]

Forms

pecus n (genitive pecoris); third declension[1]

Etymology

The collective noun is inherited from Proto-Italic *pekos, inherited from Proto-Indo-European *péḱos (“livestock; what is fleeced”).[1][2] It is related to pecū “cattle”, from *peḱu-.[1][2] The OLD compares Ancient Greek πέκος (pékos, “fleece”), and Lewis & Short compare Gothic 𐍆𐌰𐌹𐌷𐌿 (faihu, “property”), German ⟨Vieh⟩ and English fee.[3][4]

Earliest recorded meaning

Köbler's earliest source is Livius Andronicus, whom he dates 280/260–before 200 BC, and the OLD's first citation is from Cato.[5][3]

Semantic evolution

It was farm animals collectively, livestock, especially sheep and cattle, as in Cato; in the plural farm and domestic animals, as in Caesar; and in the singular one animal, as in Accius.[3]

In Ecclesiastical Latin it was sheep, cattle, a herd.[6] Wiktionary notes derogatory uses for a mindless crowd.[1] British Medieval Latin used it for a domestic animal.[7]

Timeline

  • 280/260–before 200 BC – Livius Andronicus uses it.[5]
  • 234–149 BC – Cato uses it of livestock.[3][5]
  • c. 50 BC – Caesar uses the plural.[3][5]

Meanings

Noun

  1. Livestock, cattle, sheep (collectively).[3]
  2. (plural) Farm animals, (singular) one animal.[3]
  3. (figurative) A herd of people, rabble.[1]

Word family

  • pecorālis
  • pecorōsus
  • pecusculum
  • pecorārius

pecus2 single animal

Confidence
Established
Formation
Inherited
First attested
Ennius
Ultimate origin
Proto-Indo-European (*peḱu-)

Pronunciation

  • IPA (Classical): [ˈpɛ.kʊs][1]
  • IPA (Ecclesiastical): [ˈpɛː.kus][1]

Forms

pecus f (genitive pecudis); third declension[1] Accius, Sisenna and Cicero have a neuter plural pecuda, and Ennius uses it as masculine.[3][4]

Etymology

The single beast is formed on the same root as pecū, with a stem in ⟨-ud-⟩ whose origin de Vaan finds unclear.[3][2][1]

Earliest recorded meaning

Köbler's earliest source is Ennius, whom he dates 204–169 BC, and the OLD's first citation is from Plautus.[5][3]

Semantic evolution

It was a single animal of the farm, a head of livestock, as in Plautus and Cicero, and an animal as opposed to a human being, a beast, as in Lucretius and Cicero's quantum nātūra hominis pecudibus antecēdit.[3][8] Isidore says that pecus is every creature that lacks human speech and form.[9]

In Ecclesiastical Latin it was a single head of cattle, a beast, a brute.[6]

Timeline

  • 204–169 BC – Ennius uses it.[5]
  • c. 250–184 BC – Plautus uses it.[3][5]
  • 96–55 BC – Lucretius uses it of a beast.[3][5]

Meanings

Noun

  1. A single farm animal, a head of cattle, a sheep.[3][8]
  2. A beast, brute.[3][6]

Word family

  • pecudalis
  • pecudifer

References

  1. ^ a b c d e f g h i j k Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  3. ^ a b c d e f g h i j k l m n o Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  4. ^ a b Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  5. ^ a b c d e f g h Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ a b c Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
  7. ^ 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
  8. ^ a b Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  9. ^ Isidore of Seville, Etymologiarum sive Originum libri XX, ed. W. M. Lindsay (Oxford, 1911).

Related etymologies

  • centum · also from Proto-Indo-European
  • specio · also from Proto-Indo-European
  • caedo · also from Proto-Indo-European
  • quattuor · also from Proto-Indo-European
  • venio · also from Proto-Indo-European
  • habeo · also from Proto-Indo-European
  • terra · also from Proto-Indo-European
  • homo · also from Proto-Indo-European
Cite this entry

“Pecus.” Etymologically, 16 Oct. 2026, etymologically.com/la/pecus. Accessed 17 Oct. 2026.

Last edited on . ·