Etymologically

Etymology and origin of the Latin word tonitrus

Confidence
Probable
Formation
Derivation
First attested
c. 250–184 BC, Plautus
Ultimate origin
Latin (tonō)
Etymology tree
inherited borrowed derived
Latin tono
Latin tonitrus
Latin attono
Latin attonitus
Latin intono

Pronunciation

  • Classical: [ˈtɔ.nɪ.trʊs][1]
  • Ecclesiastical: [ˈtɔː.ni.trus][1]

Forms

tonitrus m (genitive tonitrūs); fourth declension[1] The plural is tonitrūs (masculine) or tonitrua (neuter).[2][3] There is also a neuter tonitruum.[3][4] A neuter nominative tonitru rests only on the grammarians.[3]

Etymology

It is a derivative from Latin tonō (“to thunder”).[2][3][1] The OLD suggests an earlier ⟨*tonitus⟩, a noun in ⟨-tus⟩, influenced by fulgetrum (“lightning”).[2] Wiktionary and Köbler trace the verb to Proto-Indo-European *(s)tenh₂- (“to thunder”).[1][5]

Earliest recorded meaning

Köbler dates it from Plautus,[5] who has the nominative tonitrus in the Amphitruo.[4]

Semantic evolution

It means thunder.[2][3][1] Pacuvius has the sky trembling with thunder, and Virgil a speaker who will stir the whole sky with thunder.[4][3] Lucretius and Pliny the Elder speak of hearing thunder, and Cicero of lightning flashes and thunder.[3] It is also an artificial imitation of thunder or a contrivance for producing it, as in Sallust, where a statue of Victory, lowered with the sound of machine-made thunder, placed a crown on someone's head, and in Vitruvius and Phaedrus of stage machinery.[2] It also means a noise like thunder: Pliny the Elder writes of a terrible thunder heard inside when the doors are opened, and Statius and Silius Italicus of the thunder of arms and of a huge shield.[2] Stelten gives "thunder" for Church Latin.[6]

Timeline

  • c. 250–184 BC – Plautus in the Amphitruo.[4][5]
  • 220–130 BC – Pacuvius of the sky trembling with thunder.[4]
  • 86–34 BC – Sallust of stage thunder.[2]
  • 70–19 BC – Virgil of the sky stirred with thunder.[3]
  • 23/24–79 AD – Pliny the Elder of a thunderous noise.[2]

Meanings

Noun

  1. Thunder.[2][3][1][6]
  2. An artificial imitation of thunder; a machine for producing it.[2]
  3. A noise like thunder.[2]

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 j k Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e f g h i Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  4. ^ a b c d e Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  5. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ a b Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
Cite this entry

“Tonitrus.” Etymologically, 20 Oct. 2026, etymologically.com/la/tonitrus. Accessed 20 Oct. 2026.

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