Etymologically

Etymology and origin of the Latin word rabidus

Confidence
Established
Formation
Derivation
First attested
96–55 BC, Lucretius
Ultimate origin
Latin (rabiēs)
Etymology tree
inherited borrowed derived
Latin rabies
Latin rabidus

Pronunciation

  • Classical: [ˈra.bɪ.dʊs][1]
  • Ecclesiastical: [ˈraː.bi.dus][1]

Forms

rabidus (feminine rabida, neuter rabidum); first/second-declension adjective[1]

Etymology

It is from Latin rabiēs (“madness, rage”) + -idus, from the verb rabiō (“to rave”).[2][3][4] De Vaan finds the origin of ⟨rabiō⟩ uncertain: Schrijver compared Tocharian A rapurñe (“desire”), and the LIV an Iranian root seen in Parthian rf- (“to attack”), but both are isolated and doubtful.[4] Festus explained it from the dog's disease ⟨rabiēs⟩.[3]

Earliest recorded meaning

De Vaan dates it from Lucretius,[4] who has raging lions;[2] Köbler's first source is the Rhetorica ad Herennium.[5]

Semantic evolution

It is “raging, ravening”, of wild beasts, and of dogs in particular “rabid, mad”, as Seneca's sad sight of rabid dogs.[2][6] It is used of persons and monsters, as Ovid's raging Centaurs, of the Sibyl's frenzied mouth in Virgil, of raging waves, and of feelings: Catullus' Attis finds rest from the raging frenzy of his mind.[2] It is mostly poetic and post-Augustan.[6]

Church Latin glosses it “mad”.[7] English rabid (1610s) comes from it; its sense “infected with rabies” is from 1804.[8]

Timeline

  • 96–55 BC – Lucretius of raging lions.[2][5]
  • 81/79–52/50 BC – Catullus of a raging frenzy.[2][5]
  • 4 BC–65 AD – Seneca of rabid dogs.[2][5]
  • 1610s – English rabid.[8]

Meanings

Adjective

  1. Of animals, raging, ravening; of dogs, rabid, mad.[2][6][1][7]
  2. Of persons, furious, savage; of natural forces, violent.[2][1]
  3. Of feelings or conduct, frenzied, wild; of utterances, frantic.[2][1]
  • rabidē
  • rabies
  • rabiō
  • rabiōsē
  • rabiōsulus
  • rabiōsus
  • rabula
  • rabulātus
  • English rabid

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 i j 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. ^ a b c 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 Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ a b c Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  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

“Rabidus.” Etymologically, 19 Oct. 2026, etymologically.com/la/rabidus. Accessed 20 Oct. 2026.

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