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insanio

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Etymology and origin of the Latin word insanio

Confidence
Established
Formation
Derivation
First attested
c. 250–184 BC, Plautus
Ultimate origin
Latin (sānus)

Pronunciation

  • Classical: [ĩːˈsaː.ni.oː][1]
  • Ecclesiastical: [inˈsaː.ni.o][1]

Forms

īnsāniō (present infinitive īnsānīre, perfect active īnsānīvī or īnsāniī, supine īnsānītum); fourth conjugation, impersonal in the passive[1] Terence has an imperfect īnsānībat.[2]

Etymology

It is formed from īnsānus (“insane”) with the verb suffix -iō; the adjective is in- (“not”) and sānus (“healthy, sane”).[3][1] De Vaan gives ⟨sānus⟩ as Proto-Italic *sāno-, but calls the reconstruction ⟨*seh₂-no-⟩ purely mechanical: it may come from a root ⟨*seh₂-⟩ “to tie”, “what is in place”, or from the root of satis (“enough”).[4]

Earliest recorded meaning

Plautus has “I'm done for, by Hercules, the poor wretch is mad” in the Cistellaria and “you're mad, man” in the Epidicus.[3]

Semantic evolution

It is to be out of one's mind or mad, as a medical term of people, and also through supernatural possession, as Horace's īnsānīre iuvat, “it is a joy to rave”.[3][2] More often it is to behave like a madman, act crazily or rave, as in Plautus, and with in to have a mad passion for, as Horace's man mad for freedwomen.[3][2][1] Of sea and wind it is to rage, as Horace's raging Bosporus.[3][2]

Lewis and Short set it beside furō, dēlīrō and dēsipiō.[2] Church Latin glosses it “be mad or insane, rage”.[5]

Timeline

  • c. 250–184 BC – Plautus of a madman.[3][6]
  • 190–159 BC – Terence.[2][6]
  • 65–8 BC – Horace of raving, mad passion and the raging Bosporus.[3][6]

Meanings

Verb

  1. To be insane, be mad.[3][2][1][5]
  2. To act like a madman, rave;[3][2][1] īnsānīre in, to be madly in love with.[3]
  3. (of sea, wind) To rage.[3][2][5]

References

  1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  3. ^ a b c d e f g h i j k Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  4. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  5. ^ a b c Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
  6. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
Cite this entry

“Insanio.” Etymologically, 19 Oct. 2026, etymologically.com/la/insanio. Accessed 19 Oct. 2026.

Last edited on . ·