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diffundo

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Etymology and origin of the Latin word diffundo

Confidence
Established
Formation
Derivation
First attested
234–149 BC, Cato
Ultimate origin
Proto-Indo-European (*ǵʰu-n-d-)

Pronunciation

  • Classical: [dɪfˈfʊn.doː][1]
  • Ecclesiastical: [difˈfun.do][1]

Forms

diffundō (present infinitive diffundere, perfect active diffūdī, supine diffūsum); third conjugation[1]

Etymology

It is formed from dis- (“apart”) and fundō (“to pour”).[2][3][1] De Vaan derives ⟨fundō⟩ from Proto-Italic *χund- and the nasal present Proto-Indo-European *ǵʰu-n-d- (“to pour”).[4] Cognate with Ancient Greek χέω (khéō, “to pour”), Sanskrit जुहोति (juhóti, “pours, sacrifices”) and Gothic 𐌲𐌹𐌿𐍄𐌰𐌽 (giutan, “to pour”).[4]

Earliest recorded meaning

De Vaan dates it from Cato;[4] Varro has water “spread wide” over a place.[2]

Semantic evolution

It is to spread a liquid widely over a surface, to diffuse it through many channels, as Mela's Nile, and of wine to draw it off into smaller vessels, to bottle it, as Horace's wine bottled in the year of Taurus;[2][3] Pompeian jars are labelled with it.[2][3] It is to diffuse something through a body, as Varro's soul, and to spread out over a wide area, as Cicero's plane tree with spreading branches.[2][5]

Figuratively it is to spread fame or joy widely, as Cicero's Pompey whose fame was spread far and wide, also to squander, and to expand or enlarge.[2][5] It is also to relax or cheer, as Ovid's day that “will cheer everyone's spirits”.[2]

Church Latin glosses it “pour forth, spread throughout”.[6] Its participle diffūsus gave English diffuse in the 1520s.[7]

Timeline

  • 234–149 BC – Cato.[4][8]
  • 116–27 BC – Varro of water spread wide.[2][8]
  • 81–43 BC – Cicero of spreading branches and of fame.[2][8]
  • 65–8 BC – Horace of bottled wine.[2][8]
  • 1520s – English diffuse from its participle.[7]

Meanings

Verb

  1. To spread (a liquid) widely, pour out, diffuse; to draw off, bottle (wine).[2][5][1][6]
  2. To spread out, extend over a wide area; to scatter.[2][5][1]
  3. (figurative) To spread (fame, joy); to squander; to expand.[2][5]
  4. To relax, cheer.[2]

Word family

  • diffūsilis
  • diffūsiō
  • diffūsor
  • diffūsīvus
  • diffūsus

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

“Diffundo.” Etymologically, 19 Oct. 2026, etymologically.com/la/diffundo. Accessed 19 Oct. 2026.

Last edited on . ·