- Confidence
- Established
- Formation
- Derivation
- First attested
- Plautus
- Ultimate origin
- Proto-Indo-European (*ḱh₂d-)
Pronunciation
Forms
cāsus m (genitive cāsūs); fourth declension[1]
Etymology
It is from Latin cadō (“to fall”) + -tus, from earlier cāssus.[2][1] The verb is inherited from Proto-Italic *kad-e/o-, perhaps from Proto-Indo-European *ḱh₂d- (“to fall”).[3] The grammatical sense “case” is a semantic loan from Ancient Greek πτῶσις (ptôsis, “a falling, case”).[1]
Earliest recorded meaning
De Vaan dates it from Plautus,[3] who has a character say that a fall gave great pleasure.[2] Köbler dates Plautus c. 250–184 BC.[4]
Semantic evolution
Its first sense was a fall, a downward movement of people, rain or snow.[2][5] From what “befalls” it meant chance and accident, an event or occurrence, and especially a misfortune or disaster.[2] Grammarians used it of the ending of a word and of grammatical case.[2][1] Döderlein distinguishes cāsus, chance as a natural agent, from fors, chance thought of as a kind of divine being.[6] In Cicero's time the s was written double, ⟨cassus⟩.[5]
In medieval Latin it was a legal problem in a treatise, a lawsuit, a cause and a subject.[7] It survives in Italian caso and Spanish caso, and through Old French cas English case meant “what befalls one” in the early 13th century.[1][8]
Timeline
- c. 250–184 BC – Plautus uses it of a fall.[2][4]
- 81–43 BC – Cicero uses it of chance and of misfortune.[2][4]
- c. 84–c. 25 BC – Vitruvius uses it of the endings of words.[2][4]
- early 13th century – English case “what befalls one” is recorded.[8]
Meanings
Noun
- A fall, downward movement.[2]
- (grammar) An ending; a case.[2][1]
- chance, accident.[2]
- An event, occurrence.[2]
- A misfortune, disaster.[2]
- (Medieval Latin) A legal problem; a lawsuit; a cause, ground.[7]
Word family
- cāsuālis
Related words
Usage notes
Isidore explains the grammatical cases as named from falling, because nouns vary and “fall” through them.[9]
References
- ^ a b c d e f g h Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h i j k l m Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ 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
- ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ Döderlein, Ludwig (1874), Döderlein’s Hand-book of Latin Synonymes, tr. H. H. Arnold, Andover: W. F. Draper
- ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
- ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
- ^ Isidore of Seville, Etymologiarum sive Originum libri XX, ed. W. M. Lindsay (Oxford, 1911).
Related etymologies
Cite this entry
“Casus.” Etymologically, 16 Oct. 2026, etymologically.com/la/casus. Accessed 16 Oct. 2026.
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