Etymologically

iubeo

Etymology and origin of the Latin word iubeo

Confidence
Probable
Formation
Inherited
First attested
Livius Andronicus
Inherited from
Proto-Italic *jouþ-eje/o-
Ultimate origin
Proto-Indo-European (*Hyewdʰ-)

Pronunciation

  • IPA (Classical): [ˈjʊ.be.oː][1]
  • IPA (Ecclesiastical): [ˈjuː.be.o][1]

Forms

iubeō (present infinitive iubēre, perfect active iussī, supine iussum); second conjugation[1]

Etymology

It is inherited from Proto-Italic *jouþ-eje/o-, inherited from Proto-Indo-European *Hioudʰ-eie/o- (“to cause to move”), a causative.[2][1] The oldest form ⟨ioub-⟩, found in early inscriptions, fits this type, and ⟨iub-⟩ was taken from the perfect and participle.[2][3] Cognate with Ancient Greek ὑσμίνη (husmínē, “battle”) and Lithuanian judėti (“to move”).[2][3] Lewis and Short suggested *iūs habēre “to regard as right”, an idea not followed by de Vaan.[4][2]

Earliest recorded meaning

De Vaan dates it from Livius Andronicus.[2] Köbler places his career before 200 BC.[5] Early inscriptions spell it ioub- and ious-.[3]

Semantic evolution

It meant to order or tell someone to do something, to order a thing to be done, and to direct, enjoin or appoint.[3] In the assemblies it was the word for enacting a law, in the formula velītis iubeātis, and for appointing a magistrate; laws, fate and duty were also said to command.[3] Its participle iussum meant an order.[3]

Döderlein distinguishes iubēre, bidding by one's own wish, the opposite of vetō, from imperō, commanding with military authority, and praecipiō, enjoining as a teacher.[6] The stem iuss- gave the grammatical term English jussive (1825).[7]

Timeline

  • before 200 BC – Livius Andronicus uses it.[2][5]
  • 186 BC – the Senatus consultum de Bacchanalibus spells it with ou.[2][3]
  • c. 250–184 BC – Plautus has “order the doors to be opened at once”.[3][5]
  • 1825 – English jussive is recorded.[7]

Meanings

Verb

  1. To order, tell, bid (someone to do something).[3]
  2. To order (something to be done); to direct (that).[3]
  3. To enjoin; to appoint.[3]
  4. (of an assembly) To enact, decree; to appoint (a magistrate).[3]
  5. (of laws, fate, duty) To prescribe, require.[3]

Word family

  • iussiō
  • iussor
  • iussum
  • iussus
  • iniussus
  • fidēiubeō
  • English jussive

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  3. ^ a b c d e f g h i j k l m Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  4. ^ Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  5. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ Döderlein, Ludwig (1874), Döderlein’s Hand-book of Latin Synonymes, tr. H. H. Arnold, Andover: W. F. Draper
  7. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com

Related etymologies

  • humus · also from Proto-Indo-European
  • hostis · also from Proto-Indo-European
  • gens · also from Proto-Indo-European
  • frango · also from Proto-Indo-European
  • emo · also from Proto-Indo-European
  • moneo · also from Proto-Indo-European
  • radix · also from Proto-Indo-European
  • vastus · also from Proto-Indo-European
Cite this entry

“Iubeo.” Etymologically, 16 Oct. 2026, etymologically.com/la/iubeo. Accessed 16 Oct. 2026.

Last edited on . ·