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fideiubeo

Etymology and origin of the Latin word fideiubeo

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Confidence
Established
Formation
Compound
First attested
Digest
Ultimate origin
Latin (fidēs,iubeō)

Pronunciation

  • IPA (Classical): [fɪ.deːˈjʊ.be.oː][1]
  • IPA (Ecclesiastical): [fi.deˈjuː.be.o][1]

Forms

fidēiubeō (present infinitive fidēiubēre, perfect active fidēiussī, supine fidēiussum); second conjugation[1] Also written as two words, fidē iubeō.[2][3]

Etymology

It is a compound of fidēs “faith, trust” and iubeō “to order”.[2][1] De Vaan traces ⟨fidēs⟩ to Proto-Indo-European *bʰidʰ-eh₁- (“faith”) and ⟨iubeō⟩ to Proto-Indo-European *Hyowdʰ-éye/o- (“to cause to move”).[4]

Earliest recorded meaning

Gaffiot cites the Digest.[5] Köbler dates the Digest 533 AD.[6]

Semantic evolution

A legal term, it meant to become a surety, go bail, guarantee another's debt.[2][3][5]

In Ecclesiastical Latin it means to be or give surety.[7]

Timeline

  • 533 AD – The Digest uses it.[5][6]

Meanings

Verb

  1. (law) To become surety, go bail.[2][3]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon 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 Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  6. ^ a b Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  7. ^ Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
Cite this entry

“Fideiubeo.” Etymologically, 17 Oct. 2026, etymologically.com/la/fideiubeo. Accessed 17 Oct. 2026.

Last edited on . ·