Etymology and origin of the Latin word inopinus
- Confidence
- Probable
- Formation
- Back-formation
- First attested
- 70–19 BC, Virgil
- Ultimate origin
- Latin (opīnor)
Forms
inopīnus (feminine inopīna, neuter inopīnum); first/second-declension adjective[1]
Etymology
It is from Latin inopīnātus (“unexpected”), a back-formation according to the OLD and the TLL, like necopīnus.[2][3] Georges and Wiktionary instead analyse it as ⟨in-⟩ with an adjective ⟨*opīnus⟩ from opīnor (“to suppose”).[4][1] De Vaan finds no convincing etymology for that verb.[5]
Earliest recorded meaning
It is found from Virgil on:[3][6] in the Aeneid an unexpected rest has relaxed someone's limbs, inopīna quiēs.[2][7]
Semantic evolution
Virgil also has an unforeseen face of trouble and an unexpected chance, and Ovid an unforeseen sight and an unexpected war.[2][8] In prose it is found from Tacitus on, and Ammianus Marcellinus uses it often.[3] Statius and Silius Italicus use it of a person or animal caught off guard.[2][7] The grammarian Servius remarked that in Virgil it is an adjective and not a participle.[3]
Medieval writers kept both senses, “unexpected” and “taken by surprise”, and used inopīnē as an adverb, “suddenly”.[9][10]
Timeline
- 70–19 BC – Virgil uses it of an unexpected sleep.[2][6]
- 43 BC–18 AD – Ovid uses it of an unforeseen sight.[8][6]
- c. 45–96 AD – Statius uses it of a man caught off guard.[2][6]
- 98–115 AD – Tacitus uses it in prose.[3][6]
- c. 390 AD – Ammianus Marcellinus uses it often.[3][6]
Meanings
Adjective
- Unexpected, unforeseen.[2][8]
- Off one's guard, unsuspecting.[2][7]
Related words
- inopīnātus
- necopīnus
References
- ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c d e f Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
- ^ Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
- ^ 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 e f Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b c Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
- ^ a b c Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ Mittellateinisches Wörterbuch bis zum ausgehenden 13. Jahrhundert (1967–), Munich: C. H. Beck; Bayerische Akademie der Wissenschaften
- ^ 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
“Inopinus.” Etymologically, 20 Oct. 2026, etymologically.com/la/inopinus. Accessed 20 Oct. 2026.
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