Etymologically

Etymology and origin of the Latin word socer

Confidence
Established
Formation
Inherited
First attested
c. 250–184 BC, Plautus
Inherited from
Proto-Italic *swekuros
Ultimate origin
Proto-Indo-European (*swéḱuros)

Pronunciation

  • Classical: [ˈsɔ.kɛr][1]
  • Ecclesiastical: [ˈsɔː.t͡ʃer][1]

Forms

socer m (genitive socerī); second declension[1] Plautus also has a nominative socerus.[2][3] Naevius has the dative socrī.[3]

Etymology

It is inherited from Proto-Italic *swekuros, inherited from Proto-Indo-European *swéḱuros (“father-in-law”).[3][1] Cognate with Sanskrit श्वशुर (śváśura-, “father-in-law”), Ancient Greek ἑκυρός (hekurós, “father-in-law”), Lithuanian šešuras (“father-in-law”) and Old High German swehur (“father-in-law”).[3][2] The feminine socrus (“mother-in-law”) continues ⟨*swekrū-⟩, *sweḱrúh₂.[3]

Earliest recorded meaning

De Vaan dates it from Naevius.[3] Plautus uses it often, once with both forms in one scene (Menaechmi).[4]

Semantic evolution

It is the father-in-law, the wife's or husband's father.[2][4] In the plural it can be a father-in-law and his wife, the parents-in-law, as Andromache went to visit her socerōs in Virgil.[2] Socer magnus (or socer alone) is a husband's or wife's grandfather, as Festus reports.[2] Church Latin glosses it “father-in-law”, in the plural “parents-in-law”.[5]

Timeline

  • c. 235–200 BC – Naevius.[3][6]
  • c. 250–184 BC – Common in Plautus, also as socerus.[4][6]
  • 70–19 BC – Virgil of parents-in-law.[2][6]

Meanings

Noun

  1. A father-in-law.[2][1][5]
  2. (plural) Parents-in-law.[2][5]
  3. (socer magnus) A husband's or wife's grandfather.[2]

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e f g de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  4. ^ a b c Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  5. ^ a b c Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
  6. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de

Related etymologies

  • aboleo · also from Proto-Indo-European
  • fingo · also from Proto-Indo-European
  • gustus · also from Proto-Indo-European
  • dormio · also from Proto-Indo-European
  • dico · also from Proto-Indo-European
  • grex · also from Proto-Indo-European
  • decem · also from Proto-Indo-European
  • ager · also from Proto-Indo-European
Cite this entry

“Socer.” Etymologically, 18 Oct. 2026, etymologically.com/la/socer. Accessed 19 Oct. 2026.

Last edited on . ·