Etymologically

Etymology and origin of the Latin word furiosus

Confidence
Established
Formation
Derivation
First attested
c. 450 BC, Twelve Tables
Ultimate origin
Latin (furō)

Pronunciation

  • Classical: [fʊ.riˈoː.sʊs][1]
  • Ecclesiastical: [fu.riˈɔː.s̬us][1]

Forms

furiōsus (feminine furiōsa, neuter furiōsum, comparative furiōsior, superlative furiōsissimus); first/second-declension adjective[1]

Etymology

It is formed from furia (“rage, fury”) with the suffix -ōsus (“full of”).[2][3][1] The noun belongs with furō (“to rage”), for which many etymologies have been proposed and none is clearly the best.[4]

Earliest recorded meaning

The Twelve Tables have sī furiōsus est, agnātōrum gentīliumque in eō pecūniāque eius potestās estō, “if a man is mad, his agnates and clansmen shall have power over him and his property”.[5][6]

Semantic evolution

Of people it is out of one's wits, mad or frenzied, and in law a lunatic, as in the Twelve Tables and the praetor's edict, where it is also a noun, a madman or madwoman.[2][5] Of actions it is mad, wild or uncontrolled, as Cicero's “frenzied drunkenness”.[2][5] The TLL finds the superlative from Cicero on.[3]

Church Latin uses it as a noun for a mad or insane person.[7] Through Old French it gave English furious in the late 14th century.[8]

Timeline

  • c. 450 BC – The Twelve Tables on the property of a madman.[5][6]
  • 81–43 BC – Cicero of a seditious madman and of frenzied drunkenness.[2][6]
  • late 14th century – English furious, through Old French.[8]

Meanings

Adjective

  1. Mad, frenzied, raging, furious;[2][5][1] (law) lunatic;[2][5][1] furiōsus, furiōsa, a madman, madwoman.[2][7]
  2. Wild, uncontrolled (of actions).[2][5]

References

  1. ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  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 d e f g Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  6. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  7. ^ a b Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
  8. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
Cite this entry

“Furiosus.” Etymologically, 19 Oct. 2026, etymologically.com/la/furiosus. Accessed 19 Oct. 2026.

Last edited on . ·