Etymology and origin of the Latin word profecto
Forms
profectō (not comparable)[1]
Etymology
It is formed from prō (“for, as”) and factō, the ablative of factum (“deed, fact”): “for a fact”.[2][3][1][4]
Earliest recorded meaning
Köbler dates it from Plautus,[4] who has certē is est, is est profectō, “surely it is he, it is he without a doubt”.[2]
Semantic evolution
Profectō is a particle of affirmation, “without question, undoubtedly, assuredly, indeed”;[2][3][1] L&S call it very frequent and classical.[2][3][1] It often follows a conditional or causal clause, “then surely” (Cicero: if he did not think himself eloquent, he surely had a conception of eloquence).[2]
Church Latin glosses it “really, certainly, truly, in fact, without doubt”.[5]
Timeline
- c. 250–184 BC – Plautus: is est profectō.[2][4]
- 81–43 BC – Cicero uses it after a conditional clause.[2][4]
Meanings
Adverb
Related words
References
- ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h i Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ 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
Cite this entry
“Profecto.” Etymologically, 18 Oct. 2026, etymologically.com/la/profecto. Accessed 19 Oct. 2026.
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