Etymologically

Etymology and origin of the Latin word fossatum

Confidence
Established
Formation
Derivation
First attested
c. 400 Palladius; Historia Augusta More words from the 4th century
Ultimate origin
Latin fodiō
Etymology tree
inherited borrowed derived
Latin fossātum
French fossé
Italian fossato
Romanian sat

Pronunciation

  • Classical: [fɔsˈsaː.tũː][1]
  • Ecclesiastical: [fosˈsaː.tum][1]

Forms

fossātum n (genitive fossātī); second declension[1]

Etymology

It is the neuter past participle, used as a noun, from Latin fossō (“to dig”),[2][3][1] which is an intensive of fodiō (“to dig”).[2] A masculine fossātus was used beside it.[2][4]

Wiktionary lists Italian fossato, Old French fossé, Catalan fossat, Aromanian fusate and Romanian sat (“village”) among its descendants.[1]

Earliest recorded meaning

Palladius uses it for a ditch,[3][2] and Köbler also cites the Historia Augusta,[5] both of the late 4th or early 5th century AD.[5]

Semantic evolution

From a ditch, especially a military trench,[1] it came to mean the earthworks of a fortification and the fortified camp itself.[1][6] In the glossaries it also renders Greek τάφρος (táphros, “ditch”)[7] and is glossed as a grave.[2]

Medieval Latin used it for a ditch, canal or moat, a dike or rampart, a fortified camp, an army, a walled stronghold, and the duty of keeping dikes in repair.[6] The sense army is especially Spanish.[1] In British sources it is a ditch or dike, and the moat of a town, castle or house.[8] It was also spelled fossetum and fosseium.[6][5]

Timeline

  • end of 4th–beginning of 5th century AD – Palladius uses it for a ditch.[3][5]
  • 4th–5th century AD – The Historia Augusta has it.[5]
  • 1111 – A charter for St Paul's grants earth from a castle moat by the Thames for building the church's wall.[8]

Meanings

Noun

  1. A ditch or trench, especially a military one.[2][3][1]
  2. (Late Latin, Medieval Latin) A fortified camp.[1][6]
  3. (Medieval Latin) A moat; a canal.[6][8]
  4. (Medieval Latin) A dike, embankment or rampart.[6][8]
  5. (Medieval Latin) An army.[6][1]
  6. (Medieval Latin) A walled stronghold.[6]
  7. (Medieval Latin) The duty of building and keeping up dikes.[6]

References

  1. ^ a b c d e f g h i j k Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  3. ^ a b c d Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  4. ^ Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  5. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ a b c d e f g h i Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  7. ^ Goetz, Georg (1888–1923), Corpus glossariorum Latinorum, Leipzig: Teubner; vols. VI–VII Thesaurus glossarum emendatarum, digital ed. CGLO, Munich: Bayerische Akademie der Wissenschaften
  8. ^ 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
Cite this entry

“Fossatum.” Etymologically, 13 Nov. 2026, etymologically.com/la/fossatum. Accessed 14 Nov. 2026.

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