Etymologically

soror

Etymology and origin of the Latin word soror

Confidence
Established
Formation
Inherited
First attested
Naevius
Inherited from
Proto-Italic *swesōr-
Ultimate origin
Proto-Indo-European (*swésōr)

Pronunciation

  • IPA (Classical): [ˈsɔ.rɔr][1]
  • IPA (Ecclesiastical): [ˈsɔː.ror][1]

Forms

soror f (genitive sorōris); third declension[1]

Etymology

It is inherited from Proto-Italic *swesōr- (“sister”), inherited from Proto-Indo-European *swésōr (“sister”).[2][1] Cognate with Old Irish siur (“sister”), Welsh chwaer (“sister”), Sanskrit स्वसृ (svásṛ, “sister”), Lithuanian sesuõ (“sister”) and English sister.[2][3] Latin generalized the suffix ⟨-ōr-⟩ throughout the paradigm, and sobrīnus “cousin” continues *swesr-īno-.[2]

Earliest recorded meaning

De Vaan and Köbler date it from Naevius.[2][4] Plautus has a man saying a girl is as safe with him as if she were his sister.[3] Köbler dates Naevius c. 235–200 BC.[4]

Semantic evolution

It was a sister, and in poetry the name for groups of mythological sisters, such as the Fates, the Muses (doctae sorōrēs, novem sorōrēs) and the Furies.[3][5] By transfer it was used of something closely related or similar to another, such as the other hand.[3] Isidore explains it as one born “of the same seed”.[6]

In Christian Latin it was a sister in Christ, a woman vowed to chastity, and especially the wife of a man who had become a priest.[7] Medieval Latin sorōritās “sisterhood” gave English sorority.[8] It survives in French sœur and Romanian soră, and Italian sorella is from its diminutive.[1]

Timeline

  • c. 235–200 BC – Naevius uses it.[2][4]
  • c. 250–184 BC – Plautus has “as if she were my sister”.[3][4]
  • 65–8 BC – Horace speaks of the threads of the three Sisters, the Fates.[3][4]
  • 1530s – English sorority is recorded.[8]

Meanings

Noun

  1. A sister.[3]
  2. (plural) A group of mythological sisters (the Fates, the Muses).[3][5]
  3. Something closely related or similar.[3]
  4. (Ecclesiastical Latin) A sister in Christ; a woman vowed to chastity.[7]

Word family

  • sorōrcula
  • sorōricīda
  • sorōriō
  • sorōrius
  • sorōritās
  • sobrīnus
  • English sorority
  • English sister

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ 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
  3. ^ a b c d e f g h i Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  4. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  5. ^ a b Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  6. ^ Isidore of Seville, Etymologiarum sive Originum libri XX, ed. W. M. Lindsay (Oxford, 1911).
  7. ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  8. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com

Related etymologies

  • lacus · also from Proto-Indo-European
  • gigno · also from Proto-Indo-European
  • tego · also from Proto-Indo-European
  • cudo · also from Proto-Indo-European
  • cruor · also from Proto-Indo-European
  • caveo · also from Proto-Indo-European
  • reor · also from Proto-Indo-European
  • unus · also from Proto-Indo-European
Cite this entry

“Soror.” Etymologically, 16 Oct. 2026, etymologically.com/la/soror. Accessed 16 Oct. 2026.

Last edited on . ·