Etymology and origin of the Latin word infatuo
- Confidence
- Established
- Formation
- Derivation
- First attested
- 81–43 BC, Cicero
- Ultimate origin
- Latin fatuus
Forms
īnfatuō (present infinitive īnfatuāre, perfect active īnfatuāvī, supine īnfatuātum); first conjugation[1]
Etymology
It is from Latin in- + fatuus (“foolish”), a verb in ⟨-āre⟩.[2][3] De Vaan tentatively derives fatuus from for (“to say”), through Proto-Italic *fatowo- (“of speech”): Fatuus was another name of the god Faunus, who foretold the future, and his name would then have come to be used disparagingly for “silly”.[4]
Earliest recorded meaning
The TLL finds it from Cicero on.[3] In the Philippics Cicero uses it of making fools of people with public pay, mercēde pūblicā.[5][6]
Semantic evolution
It means to make a fool of, to infatuate.[2][6] The Bellum Africum uses it of deluding with words, and Seneca writes that flattery makes a fool of everyone in his own measure.[5][6] The TLL notes that it becomes more frequent from the Itala on.[3]
In the Itala's version of Matthew it is used of salt that has lost its savour, sī sal infatuātum fuerit,[7] and Jerome too speaks of salt made tasteless.[6] The Vulgate uses it of turning a man's counsel to foolishness, and Jerome of a man besotted with the love of women.[5]
Timeline
- 81–43 BC – Cicero uses it of fooling people with public pay.[5][8]
- 4 BC–65 AD – Seneca uses it of the effect of flattery.[5][8]
- after 220 AD – The Itala uses it of salt that has lost its taste.[7][8]
- 390–406 AD – The Vulgate uses it of counsel turned to folly.[5][8]
Meanings
Verb
- To make a fool of, infatuate.[2][6]
- (Late Latin) To make insipid, deprive of taste.[6][7]
- (Late Latin) To turn counsel into folly.[5]
Related words
References
- ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
- ^ 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 g Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
- ^ a b c d e f Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ 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 d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
Cite this entry
“Infatuo.” Etymologically, 20 Oct. 2026, etymologically.com/la/infatuo. Accessed 23 Oct. 2026.
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