Etymologically

prex

Etymology and origin of the Latin word prex

Confidence
Established
Formation
Inherited
First attested
Plautus
Inherited from
Proto-Italic *prek-
Ultimate origin
Proto-Indo-European (*preḱ-)

Pronunciation

  • IPA (Classical): [ˈprɛks][1]
  • IPA (Ecclesiastical): [ˈprɛks][1]

Forms

prex f (genitive precis); third declension[1]

Etymology

It is inherited from Proto-Italic *prek-, inherited from Proto-Indo-European *preḱ- (“question”), a root noun of the root *preḱ- “to ask” of poscō “to demand” and procus “suitor”.[2][3] Cognate with Sanskrit प्राश् (prā́ś-, “questioning, dispute”), Avestan 𐬟𐬭𐬀𐬯𐬁 (frasā-, “question”) and Welsh rheg (“gift; curse”), and the OLD compares German fragen (“to ask”).[2][3]

Earliest recorded meaning

De Vaan dates it from Plautus, whose captive begs “by this prayer” (per precem).[2][3] Köbler dates Plautus c. 250–184 BC.[4]

Semantic evolution

It was used mostly in the plural precēs, the nominative and genitive singular being found only in grammarians.[3][5] It meant an entreaty or request in general, and especially a prayer to a god, as Plautus' prayers to Venus.[3] Christian Latin used it for prayers and the prex sacerdōtālis, the canon of the Mass.[6]

In medieval law it was a labour service done on request and a tallage, after the German bede.[6] Its verb precor became Vulgar Latin *precāre and Old French preier, the source of English pray in the early 13th century, precārius “obtained by entreaty” gave English precarious in the 1640s.[7]

Timeline

  • c. 250–184 BC – Plautus uses per precem and speaks of prayers to Venus.[3][4]
  • 234–149 BC – Cato uses it.[4]
  • early 13th century – English pray is recorded, from precārī through French.[7]
  • 1640s – English precarious is recorded.[7]

Meanings

Noun

  1. An entreaty, request, supplication.[3]
  2. A prayer (to a god).[3]
  3. (Medieval Latin) A labour service on request; a tallage.[6]
  4. (Ecclesiastical Latin) prex sacerdōtālis, the canon of the Mass.[6]

Word family

  • precārius
  • precāria
  • precor
  • procō
  • procor
  • procāx
  • poscō
  • procus
  • English pray
  • English precarious

References

  1. ^ a b c 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 Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  4. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  5. ^ Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  6. ^ a b c d Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  7. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com

Related etymologies

  • opus · also from Proto-Indo-European
  • albus · also from Proto-Indo-European
  • potis · also from Proto-Indo-European
  • salvus · also from Proto-Indo-European
  • socius · also from Proto-Indo-European
  • signum · also from Proto-Indo-European
  • frater · also from Proto-Indo-European
  • foedus · also from Proto-Indo-European
Cite this entry

“Prex.” Etymologically, 16 Oct. 2026, etymologically.com/la/prex. Accessed 16 Oct. 2026.

Last edited on . ·