Etymologically

Etymology and origin of the Latin word prolongo

Confidence
Established
Formation
Derivation
First attested
c. 315–368 Hilary of Poitiers
Ultimate origin
Latin longus
Etymology tree
inherited borrowed derived
Latin longus
Aromanian lungu
Aromanian ningã
French long
Italian lungo
Latin prōlongō
English prolong
From the same root
Latin ēlongō ← longus
Latin longaevus ← longus
Latin longē ← longus
Latin longiter ← longus
Latin longitūdō ← longus
Latin longurius ← longus
Latin praelongus ← longus
French allonger ← long
French longtemps ← long

Pronunciation

  • Classical: [proːˈɫɔŋ.ɡoː][1]
  • Ecclesiastical: [proˈlɔŋ.ɡo][1]

Forms

prōlongō (present infinitive prōlongāre, perfect active prōlongāvī, supine prōlongātum); first conjugation[1]

Etymology

It is formed from Latin prō- + longus (“long”).[2][3][4][5] The TLL compares ēlongō.[6]

Earliest recorded meaning

The TLL finds it first in the Old Latin Bible, in Isaiah's “lengthen your cords” as quoted by Augustine.[6] Hilary of Poitiers has peccata prolongans (“drawing out sins”) in his commentary on Psalm 128.[6][7]

Semantic evolution

It meant to make something longer in space or further off, and above all to prolong in time: the Psalms speak of a sojourn prolonged, the Vulgate of days prolonged, and Augustine in the Confessions of memory lengthening as he sings.[6][2][3] Lewis and Short call it a Late Latin word used for prōrogō and prōferō.[2] In Medieval Latin it also meant to remove or banish, to move away, and to delay or put off,[8][9] and grammarians used it for lengthening a syllable.[10] English prolong (early 15th century) comes from Old French and directly from Late Latin, and purloin comes from the Anglo-French form of the same elements.[5]

Timeline

  • c. 315–367/368 AD – Hilary of Poitiers uses it of drawing out sins.[6][7]
  • 390–406 AD – The Vulgate uses it for prolonging one's days.[2][3][4][7]
  • 354–430 AD – Augustine uses it in the Confessions.[11][6][7]
  • 796 – Alcuin writes that he wishes another's life to be prolonged.[10]
  • early 15th century – English borrows it as prolong.[5]

Meanings

Verb

  1. To lengthen, extend in space.[6][10]
  2. To prolong, protract; to lengthen life or days.[2][3][6][12]
  3. (Medieval Latin) To remove, banish;[8] (intransitive) to move away.[8]
  4. (Medieval Latin) To delay, put off.[8][9]
  5. (Medieval Latin, grammar) To lengthen a syllable.[10]

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  3. ^ a b c d Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  4. ^ a b Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  5. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  6. ^ a b c d e f g h Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  7. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  8. ^ a b c d Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  9. ^ a b Lexicon mediae et infimae Latinitatis Polonorum (1953–), Kraków: Instytut Języka Polskiego PAN; electronic ed. elexicon.scriptores.pl
  10. ^ a b c d 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
  11. ^ Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  12. ^ Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson

Borrowed into

Cite this entry

“Prolongo.” Etymologically, 7 Nov. 2026, etymologically.com/la/prolongo. Accessed 7 Nov. 2026.

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