- Confidence
- Established
- Formation
- Derivation
- First attested
- Cicero
- Ultimate origin
- Latin (trāns)
Pronunciation
Forms
trānstrum n (genitive trānstrī); second declension[1]
Etymology
It is from trāns “across” with the instrumental suffix -trum.[2][1][3]
Earliest recorded meaning
Köbler's earliest source is Cicero, whom he dates 81–43 BC.[4]
Semantic evolution
It was a crossbeam laid across a structure, a transom, as in Vitruvius, and especially a thwart, a rowers' bench across a boat, as in Cicero, Caesar and Virgil.[2][5]
British Medieval Latin used it for a crossbeam and for part of a necklace or brooch.[6] It survives in Italian trasto and Spanish trasto.[1] English transom (mid-14th century, a crossbeam over an opening) is probably from it.[3]
Timeline
- 81–43 BC – Cicero uses it.[4]
- c. 84–c. 25 BC – Vitruvius uses it of a crossbeam.[5][4]
- mid-14th century – English transom is recorded.[3]
Meanings
Noun
Word family
- trānstillum
Related words
- trāns
- English transom
References
- ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
- ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b c Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ 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
Cite this entry
“Transtrum.” Etymologically, 16 Oct. 2026, etymologically.com/la/transtrum. Accessed 17 Oct. 2026.
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