Etymology and origin of the Latin word inconsultus
- Confidence
- Established
- Formation
- Derivation
- First attested
- c. 250–184 BC, Plautus
- Ultimate origin
- Proto-Indo-European (*s(e)lh₁-e/o-)
Forms
incōnsultus (feminine incōnsulta, neuter incōnsultum); first/second-declension adjective[1]
Etymology
It is from Latin in- (“not”) + cōnsultus (“considered, consulted”), the negative prefix with the participle of cōnsulō (“to deliberate, consult”).[2][1] De Vaan lists it among the derivatives of cōnsulō, which he traces to Proto-Italic *kom-se/ol-e/o- (“to consult”) and Proto-Indo-European *s(e)lh₁-e/o- (“to take”), comparing Ancient Greek εἷλον (heîlon, “took”).[3] He mentions an older alternative, *kom-sed- "to sit together", which he finds semantically attractive but formally weaker.[3]
Earliest recorded meaning
Plautus has it first, in a play on cōnsultum: a well-considered plan becomes an ill-considered one if it is of use to the enemy.[2][3]
Semantic evolution
Most often it is active, of people who act without taking counsel, thoughtless or rash: Cicero pairs it with temerārius.[2] Virgil uses it of people who leave the Sibyl without having received an answer.[2] With passive force it means not consulted, as when Livy tells of games vowed without consulting the senate;[2][4] Lewis & Short note that this use is probably not Ciceronian.[2][4] Medieval texts keep the passive sense, of a person whose advice has not been asked.[5]
Timeline
- c. 250–184 BC – Plautus of an ill-considered plan.[2][6]
- 81–43 BC – Cicero of a rash man.[2][6]
- 70–19 BC – Virgil of people leaving without advice.[2][6]
- 59 BC–17 AD – Livy of the senate not being consulted.[2][6]
Meanings
Adjective
- Not having taken counsel, thoughtless, rash, ill-advised; of words and acts, unwise.[2][4][1][7]
- (poetic) Not having received advice at a consultation.[2]
- Not consulted, unasked.[2][4][1][5]
Usage notes
Beside it is a rare fourth-declension noun incōnsultus, found only in the ablative: Plautus has incōnsultū meō, "without consulting me".[2][4][3] The adverb is incōnsultē.[7]
References
- ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h i j k l m n Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c d 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 Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
- ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
Derived terms
Cite this entry
“Inconsultus.” Etymologically, 19 Oct. 2026, etymologically.com/la/inconsultus. Accessed 20 Oct. 2026.
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