Etymologically

Etymology and origin of the Italian word undici

Confidence
Established
Formation
Inherited
First attested
1211 account book of Florentine bankers More words from the 13th century
Inherited from
Latin undecim
Ultimate origin
Latin undecim
Etymology tree
inherited borrowed derived
Latin ūnus
Aromanian un
French un
Italian un
Italian uno
Spanish uno
Latin ūndecim
Italian undici
From the same root
Latin adūnō ← ūnus
Latin noenum ← ūnus
Latin ūllus ← ūnus
Latin ūna ← ūnus
Latin ūnanimus ← ūnus
Latin ūncia ← ūnus
Latin ūndēvīgintī ← ūnus
Latin ūni- ← ūnus
Latin ūnicornis ← ūnus
Latin ūnicus ← ūnus
Latin ūnilaterālis ← ūnus
Latin ūniō ← ūnus
Latin ūnisonus ← ūnus
Latin ūnitās ← ūnus
Latin ūniter ← ūnus
Latin ūniversus ← ūnus
Latin ūnusquisque ← ūnus
Italian ognuno ← uno
Italian qualcuno ← uno
Latin ūndecimus ← ūndecim

Pronunciation

  • /ˈun.di.t͡ʃi/[1]

Forms

undici (invariable)[2] Old Italian forms include undeci, undece, undese and ondesi.[3]

Etymology

It is inherited from Latin ūndecim (“eleven”), a compound of ūnus (“one”) and decem (“ten”).[4][5][2][1] The same Latin word gave French onze, Occitan onze, Catalan onze, Spanish once and Portuguese onze, and Dalmatian jonko in Vegliote;[5][6][7] Romanian has instead a new phrase, un spre zeci.[5][6][7]

The Latin word goes back to an earlier *oinodecem, from Proto-Indo-European *óynom and *déḱm̥t.[1] The ⟨i⟩ of the second part, against the ⟨e⟩ of the word for “ten”, is not well explained: de Vaan thinks it was taken from the ordinals such as undecimus.[8]

The Italian final ⟨-i⟩ is itself a problem, discussed by Castellani.[4] The form undeci, closer to Latin, was also used (Ariosto, 1532), and Gherardini remarked that the form with ⟨-i⟩ was the more common one, “though without reason”.[4]

Earliest recorded meaning

The first record is in an account book of Florentine bankers of 1211, as the number made of ten units and one.[4][3][2]

Semantic evolution

Old Italian used the numeral in compounds (dugentoundici) and for a score at dice.[3] As a noun it names the number and its sign (14th century, the Ottimo commento).[4]

In the 20th century undici became a name for a football team, from its eleven players (1942), and l'undici azzurro the Italian national side (1965).[4] In betting it is a winning score of the second category.[2]

Timeline

  • 1211 – An account book of Florentine bankers has undici.[4][3]
  • 1304–1308 – Dante uses the ordinal undecimo.[4]
  • 1300s – The noun undici names the number and its sign.[4]
  • 1532 – Ariosto writes undeci.[4]
  • Before 1698 – Francesco Redi uses undicesimo.[4]
  • 1879 – Undicenne “eleven-year-old” is recorded.[4]
  • 1942 – Undici is recorded for a football team.[4]

Meanings

Numeral

  1. eleven, ten plus one; written 11 or XI: ha undici anni.[2][1]
  2. After a noun, with ordinal value, eleventh: il capitolo undici.[2]

Noun

  1. The number eleven and the sign for it.[2][4]
  2. The eleventh day of a month, or the eleventh year of a century: l'undici marzo.[2]
  3. Eleven o'clock, or 23:00.[2]
  4. (football) A team of eleven players: l'undici azzurro.[2][4]

Word family

  • undicesimo
  • undecimo
  • undicenne

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j De Mauro, Tullio (ed.) (2003), Grande dizionario italiano dell'uso, CD-ROM version 2.0, Torino: UTET
  3. ^ a b c d Tesoro della Lingua Italiana delle Origini (1997–), Opera del Vocabolario Italiano, CNR, Firenze; tlio.ovi.cnr.it
  4. ^ a b c d e f g h i j k l m n o Cortelazzo, Manlio; Zolli, Paolo (1999), Dizionario etimologico della lingua italiana, 2nd ed. by Manlio Cortelazzo and Michele A. Cortelazzo, Bologna: Zanichelli
  5. ^ a b c Nocentini, Alberto; Parenti, Alessandro (2010), l'Etimologico: vocabolario della lingua italiana, Firenze: Le Monnier
  6. ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
  7. ^ a b Körting, Gustav (1907), Lateinisch-romanisches Wörterbuch: etymologisches Wörterbuch der romanischen Hauptsprachen, 3rd ed., Paderborn: Schöningh
  8. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill

Related etymologies

Cite this entry

“Undici.” Etymologically, 10 Nov. 2026, etymologically.com/it/undici. Accessed 10 Nov. 2026.

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