Etymologically

Etymology and origin of the Latin word -tio

Confidence
Probable
Formation
Inherited
First attested
c. 250–184 BC Plautus
Inherited from
Proto-Italic *-tiō
Ultimate origin
Proto-Italic *-tiō

Pronunciation

  • Classical: [ti.oː][1]
  • Ecclesiastical: [t͡si.o][1]

Forms

-tiō f (genitive -tiōnis); third declension[1] After verbs with a supine in -sum it appears as -siō.[2] Wiktionary also lists the spelling -ciō.[1]

Etymology

The suffix is probably inherited from Proto-Italic *-tiō, an n-stem extension of Proto-Indo-European *-tis.[1] Sihler likewise analyses it as an agglutination of the ōn-stems and the feminine nouns of action in -ti-.[3] Wiktionary also records two alternatives: a derivation from Proto-Indo-European *-Hō, or from Proto-Indo-European *-tyon, with Old Armenian -ութիւն (-utʻiwn) as a cognate.[1] Fortson too relates the Armenian suffix to the Latin abstract nouns in -tiōn-.[4]

Sihler notes that the formation is also abundant in Celtic.[3] In Italic it has a parallel in Oscan úíttiuf (“use”), from Proto-Italic *oitiōns, beside ūtiō, which is more archaic in having no -n in the nominative singular and no added -s.[4]

Earliest recorded meaning

An inscription from Praeneste (CIL 1.60) has a genitive of nātiō “birth” spelled with the ending ⟨-onu⟩.[2] Among literary texts, Plautus already has ōrātiō, for the action of speaking, in the Amphitruo, and cantiō, a song, in the Stichus.[2]

Semantic evolution

Weiss calls it far more productive than the older deverbal abstracts in -iō1,[5] and Sihler describes it as vigorously productive,[3] with extended forms such as -ātiō and -ītiō.[3] Its nouns name the action of the verb, then often the result: lēctiō is both a selection and a reading.[5]

In English the ending appears as -tion; in Middle English, in words that came through Old French, it was often spelled -cion and was later regularized.[6]

Timeline

Meanings

Suffix

  1. Added to verbs, forms feminine action nouns naming the process, action or result of the verb, like English -tion and -ing: ōrātiō, cantiō.[2][1]
  2. As -siō, with verbs whose supine is in -sum: cursiō, missiō.[2]

Word family

  • English -tion
  • French -aison
  • Italian -zione
  • Romanian -ciune
  • Spanish -zón

References

  1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d Sihler, Andrew L. (1995), New Comparative Grammar of Greek and Latin, New York: OUP
  4. ^ a b Fortson, Benjamin W., IV (2010), Indo-European Language and Culture: An Introduction, 2nd ed., Malden, MA / Oxford: Wiley-Blackwell
  5. ^ a b c Weiss, Michael (2020), Outline of the Historical and Comparative Grammar of Latin, 2nd ed., Ann Arbor: Beech Stave
  6. ^ Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  7. ^ a b Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de

Related etymologies

  • quis · also from Proto-Italic
  • cum · also from Proto-Italic
  • ego · also from Proto-Italic
  • is · also from Proto-Italic
  • in · also from Proto-Italic
  • qui · also from Proto-Italic
  • et · also from Proto-Italic
  • ex · also from Proto-Italic
Cite this entry

“-tio.” Etymologically, 6 Nov. 2026, etymologically.com/la/-tio. Accessed 6 Nov. 2026.

Last edited on . ·