Etymologically

sagacitas

Etymology and origin of the Latin word sagacitas

Confidence
Established
Formation
Derivation
First attested
81–43 BC, Cicero
Ultimate origin
Latin (sagāx)
Etymology tree
inherited borrowed derived
Latin sagax
Latin sagacitas

Forms

sagācitās f (genitive sagācitātis); third declension[1]

Etymology

It is from Latin sagāx (“keen-scented, perceptive”) + -tās.[2][1][3] De Vaan traces sagāx to Proto-Italic *sag-āk- (“perceptive”), beside sāgiō (“to perceive”), praesāgiō (“to foresee”) and sāgus (“prophetic”), and connects the group with words from Proto-Indo-European *seh₂g- (“to seek, track”).[4] Cognate with Old Irish saigid (“to try to reach”), Hittite šāgāi- (“omen”), Ancient Greek ἡγέομαι (hēgéomai, “to direct, lead”) and English seek.[4]

Earliest recorded meaning

Köbler records it first in Cicero,[5] who uses it of the keen scent of dogs, sagācitāte canum ad ūtilitātem nostram abūtimur, “we make use of the keen scent of dogs for our benefit”.[2][6]

Semantic evolution

Its first sense is a keen sense of smell, above all in dogs,[2][3] as in Cicero and Pliny the Elder;[3][7] Seneca extends it to the keenness of the senses in general.[2][3] Already in Cicero it also means mental acuteness or shrewdness:[2][3] in the Verrines he speaks of a remarkable flair for discovering ornaments,[2] and Nepos says of a man that he was too shrewd to be deceived.[3] Lewis & Short give sollertia and acūmen as synonyms.[3] Medieval writers in Britain kept both senses and also used it for eagerness or zeal, as in Aldhelm.[8] English took sagacity about 1500, through French.[9]

Timeline

  • 81–43 BC – Cicero uses it of the scent of dogs and of shrewdness.[2][5]
  • c. 100–24 BC – Nepos uses it of a man too shrewd to be deceived.[3][5]
  • 4 BC–65 AD – Seneca applies it to the senses in general.[3][5]
  • 23/24–79 AD – Pliny the Elder uses it of dogs and of Hipparchus' discovery about eclipses of the moon.[3][5]
  • Medieval Latin – Aldhelm uses it of zeal for reading.[8]
  • c. 1500 – Borrowed into English as sagacity, through French.[9]

Meanings

Noun

  1. Keenness of scent, especially of dogs; keenness of the senses in general.[2][3][10]
  2. Acuteness of mind, shrewdness, sagacity, flair.[2][3][11]
  3. (Medieval Latin) Keenness, eagerness for something, zeal.[8]

References

  1. ^ a b 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 h i j k l Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  4. ^ a b de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  5. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  7. ^ Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  8. ^ a b c 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
  9. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  10. ^ Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  11. ^ Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
Cite this entry

“Sagacitas.” Etymologically, 20 Oct. 2026, etymologically.com/la/sagacitas. Accessed 20 Oct. 2026.

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