Etymologically

traiectus

Etymology and origin of the Latin word traiectus

Confidence
Established
Formation
Derivation
First attested
170–c. 90 BC, Accius
Ultimate origin
Latin trāiciō
Etymology tree
inherited borrowed derived
Latin iacio
Latin traicio
Latin traiectus
From the same root
Latin circumicio ← iacio
Latin disicio ← iacio
Latin iactus ← iacio
Latin intericio ← iacio
Latin reicio ← iacio

Pronunciation

  • Classical: [traːˈjɛk.tʊs], [traːˈjɛk.tʊs][1]
  • Ecclesiastical: [traˈjɛk.tus], [traˈjɛk.tus][1]

Forms

trāiectus m (genitive trāiectūs); fourth declension[1] Inscriptions have the spelling ⟨trēiectus⟩.[2] Caesar writes ⟨trānsiectus⟩.[3]

Etymology

It is from Latin trāiciō (“to throw across, cross”) + -tus.[2][4][5] That verb is trāns (“across”) and iaciō (“to throw”);[1] de Vaan derives ⟨iaciō⟩ from Proto-Italic *jak-i- (“to throw”) and the root Proto-Indo-European *(H)ieh₁- (“to throw, let go”).[6] Cognate with Ancient Greek ἵημι (híēmi, “to send, let go, throw”).[6]

Earliest recorded meaning

The OLD's earliest example is from a tragedy of Accius, who uses the plural of ways through the woods.[2][7] Köbler dates it from Livy.[5]

Semantic evolution

It meant the act of crossing a river or strait:[2][4] Caesar uses it of being cut off from a march or a crossing, Livy of a man drowned while crossing the river Albula, and Suetonius of Augustus twice caught by a storm during a crossing.[2][3] Lewis and Short note that Cicero does not use it, but says trāiectiō instead.[3] From this came a route across, often with its length: Caesar writes of the shortest crossing to Britain, and Livy and Pliny the Elder give the distances of crossings by sea.[2][7] It also meant a crossing place, as in the Bellum Alexandrinum and Tacitus, and in inscriptions a ferry service.[2]

Conte notes it in place names, such as Mosae Traiectus, Maastricht.[7] Niermeyer records the sense ford, already in Hirtius,[8] and Bede uses it of a crossing of fifty miles from Gessoriacum.[9]

Timeline

  • 170–c. 90 BC – Accius uses it of ways through the woods.[2][5]
  • c. 50 BC – Caesar uses it of the crossing to Britain.[2][5]
  • 59 BC–17 AD – Livy uses it of crossing a river.[2][5]
  • c. 75–c. 150 AD – Suetonius uses it of a sea crossing.[2][5]
  • 98–115 AD – Tacitus uses it of a crossing place.[2][5]

Meanings

Noun

  1. The act of crossing over (a river or strait), passage.[2][3]
  2. A route across; the distance of a crossing.[2][7]
  3. A crossing place; a ferry.[2][4]
  4. (Medieval Latin) A ford.[8]

Usage notes

trāiectus, -a, -um is also the past participle of trāiciō.[3][7] The OLD gives it no entry of its own, and Gaffiot lists it apart from the noun.[2][10]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  4. ^ a b c Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  5. ^ a b c d e f g Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ 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
  7. ^ a b c d e Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  8. ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  9. ^ 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
  10. ^ Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
Cite this entry

“Traiectus.” Etymologically, 20 Oct. 2026, etymologically.com/la/traiectus. Accessed 22 Oct. 2026.

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