Etymologically

Etymology and origin of the Romanian word doi

Confidence
Established
Formation
Inherited
First attested
c. 1500 Psaltirea Hurmuzaki More words from the 15th century
Inherited from
Latin *dui
Ultimate origin
Proto-Indo-European *dwóh₁

Pronunciation

Forms

doi m (feminine and neuter două)[1] Old texts spell the feminine doao, doauă, doo or douo.[2][3] Ureche writes doao: „Iaste făcută ţara den doao limbi” “the country is made up of two peoples”.[4] Neculce has doo: „că-l scoses-în doo rânduri să-i taie capul” “for he had twice taken him out to cut off his head”.[4] A rare plural doiuri is used for the figure.[3]

Etymology

It is inherited from Vulgar Latin *duī (“two”), the masculine remade from Classical duo on the model of the ordinary plural ending -ī, with the feminine duae behind ⟨două⟩.[2][5][3][1] DELR, after Candrea and Densusianu, explains the vowel ⟨o⟩ instead of ⟨u⟩ by a contraction of the accusative duōs to *dos.[2] The Latin numeral goes back to Proto-Indo-European *dwóh₁.[1][6]

The word survives in all four branches: Aromanian doi, Megleno-Romanian doi and Istro-Romanian doi, each with its own feminine.[2][5][7][8][9] The same remade masculine is found in Old French dui, the nominative beside deus, and in old Italian dui; other Romance cognates are Italian due, French deux and Spanish dos.[1][5][10][11]

Earliest recorded meaning

DELR's first record is in the Psaltirea Hurmuzaki, copied about 1500–1520, where the ordinal al doile “the second” also appears.[2] Tiktin's first record is the Codicele Voronețean (16th century), at Acts 19:10.[12] A Romanian rule of 1561–1562 already uses both genders: „Muiarea ceaea ce va zăcea cu doi frați sau bărbatul cu douo surori” “the woman who lies with two brothers, or the man with two sisters”.[4]

Semantic evolution

Besides counting, the numeral marks a small, vague number, as in două vorbe “a few words”, and is used as an ordinal (tomul doi “volume two”) and as a noun for the figure 2, a playing card or a mark.[3][13][2] Tiktin notes that in counting aloud Romanians say unul, doi, trei or una, două, trei according to the gender of the things they have in mind.[12]

Romanian built a large family on the word.[2] Doisprezece “twelve” is formed with spre “upon” and zece, and douăzeci “twenty” with the feminine două and zeci.[2] The verb îndoi first meant “to double” and also came to mean “to bend” and “to doubt”, and gave îndoială “doubt”.[2][5]

Timeline

  • c. 1500–1520 – doi and the ordinal al doile in the Psaltirea Hurmuzaki, the first record.[2]
  • 1551–1553 – doisprezece “twelve” in a Slavonic–Romanian Gospel.[2]
  • 1561 – doaozeci “twenty” in the Codex Bratul.[2]
  • 1563–1583 – îndoi “to double” in the Codicele Voronețean.[2]
  • 1651 – îndoială “doubt” in the Alba Iulia Psalter.[2]
  • 1837 – doime “a pair; a half” in Anton Pann.[2]
  • 1909 – dedoi, a folk dance in pairs.[2]

Meanings

Numeral

  1. two: the number between one and three, written 2 or II: Am cumpărat două pâini și doi castraveți.[13][3][1]
  2. (before a noun, with vreo) a few, some: vreo doi oameni “a couple of people”.[13][12]
  3. (with ordinal value) the second: capitolul doi “chapter two”.[13]
  4. (as a noun) the figure 2; an object marked with it, such as a playing card or a school mark.[13][14][2]

Word family

  • doilea
  • doisprezece
  • douăzeci
  • doime
  • îndoi
  • îndoială
  • îndoielnic
  • dezdoi
  • dedoi

Usage notes

Două is used with feminine and neuter nouns: doi băieți, două fete, două scaune.[1][13] Common phrases are în două or pe din două “in two, in halves”, la doi pași “very close by” and nici una, nici două “all of a sudden, without further ado”.[13][3]

References

  1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q Academia Română, Institutul de Lingvistică „Iorgu Iordan – Al. Rosetti” (2011–), Dicționarul etimologic al limbii române (DELR), vol. I: A–B (2011), vol. II: C (2015–2018), București: Editura Academiei Române; continued online at delr.lingv.ro, p. s.v. doi
  3. ^ a b c d e f Academia Română, Institutul de Lingvistică „Iorgu Iordan – Al. Rosetti” (2010), Micul dicționar academic, 2nd ed., 4 vols., București: Univers Enciclopedic Gold, p. 1, 740
  4. ^ a b c Academia Română (1965–2010), Dicționarul limbii române (DLR), serie nouă, tom I–XIX, București: Editura Academiei Române, p. s.v. doi
  5. ^ a b c d Ciorănescu, Alexandru (1958–1966), Diccionario etimológico rumano, La Laguna: Universidad de La Laguna (Romanian ed.: Dicționarul etimologic al limbii române, București: Saeculum, 2001), p. s.v. doi
  6. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  7. ^ Papahagi, Tache (1963), Dicționarul dialectului aromân, general și etimologic, București: Editura Academiei Republicii Populare Romîne, p. 410
  8. ^ Saramandu, Nicolae (coord.) et al. (2010–), Dicționarul dialectului meglenoromân, general și etimologic, fascicles in Fonetică și dialectologie XXIX–, p. 227
  9. ^ Kovačec, August (1998), Istrorumunjsko-hrvatski rječnik (s gramatikom i tekstovima), Pula
  10. ^ Pușcariu, Sextil (1905), Etymologisches Wörterbuch der rumänischen Sprache I: Lateinisches Element, Heidelberg: Carl Winter, p. 47
  11. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 2798
  12. ^ a b c Tiktin, Hariton (2000–2005), Rumänisch-deutsches Wörterbuch, 3rd ed., revised by Paul Miron and Elsa Lüder, 3 vols., Cluj-Napoca: Clusium, p. s.v. doi
  13. ^ a b c d e f g DEX (2009), Dicționarul explicativ al limbii române [Explanatory dictionary of the Romanian language], Bucharest: Editura Univers Enciclopedic, p. 326
  14. ^ Academia Română, Institutul de Lingvistică „Iorgu Iordan – Al. Rosetti” (2002), Noul dicționar explicativ al limbii române, București: Litera Internațional, p. s.v. doi

Related etymologies

  • apă · also from Latin
  • bun · also from Latin
  • unde · also from Latin
  • veni · also from Latin
  • noi · also from Latin
  • bine · also from Latin
  • un · also from Latin
  • și · also from Latin
Cite this entry

“Doi.” Etymologically, 11 Nov. 2026, etymologically.com/ro/doi. Accessed 11 Nov. 2026.

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