- Confidence
- Established
- Formation
- Derivation
- First attested
- Plautus
- Ultimate origin
- Latin (sciō)
Pronunciation
Forms
cōnscius (feminine cōnscia, neuter cōnscium); first/second-declension adjective[1]
Etymology
It is from con- (“with”) and the root of sciō “to know”, with the adjective suffix -us, or from cōnsciō “to be aware”.[2][1][3] Etymonline suggests it may be a loan-translation of Ancient Greek συνειδώς (syneidṓs).[3]
Earliest recorded meaning
The OLD's first citations are from Plautus, of sharing secret knowledge and of a guilty conscience.[2] Köbler's first source is Terence.[4] Köbler dates Plautus c. 250–184 BC.[4]
Semantic evolution
It meant sharing knowledge, especially secret knowledge, privy to, as Cicero's man most privy to his zeal for his friend, and poetically of things, as Virgil's witnessing stars.[2][5] As a noun it meant an accomplice, accessory to a crime or plot, as in Cicero.[2] With a reflexive dative it meant inwardly aware, conscious of one's own acts, as in Ovid, and it also meant conscious of guilt, guilty, as in Plautus and Catullus.[2]
In Medieval Latin it meant sharing knowledge, privy.[6] English conscious was borrowed about 1600, first meaning “privy to”.[3]
Timeline
- c. 250–184 BC – Plautus uses it of shared secrets and of guilt.[2][4]
- 81–43 BC – Cicero uses it of accomplices.[2][4]
- 43 BC–18 AD – Ovid uses it of inner awareness.[2][4]
- c. 1600 – English conscious is recorded.[3]
Meanings
Adjective
- Sharing knowledge, privy (to).[2]
- Privy to a crime, (as noun) an accomplice.[2]
- Inwardly aware, conscious.[2]
- Conscious of guilt, guilty.[2]
Word family
- inconscius
Related words
- sciō
- cōnsciō
- cōnscientia
- English conscious
References
- ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h i j k l Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
- ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
- ^ 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
“Conscius.” Etymologically, 16 Oct. 2026, etymologically.com/la/conscius. Accessed 16 Oct. 2026.
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