Etymologically

Etymology and origin of the Italian word si

si1 reflexive pronoun

Confidence
Established
Formation
Inherited
First attested
late 13th century, Novellino
Inherited from
Latin se
Ultimate origin
Proto-Indo-European *se
Etymology tree of si1
inherited borrowed derived
Latin se
French se
French soi
Italian se
Italian si

Pronunciation

Forms

si[1] Before lo, la, li, le and ne it becomes se (se lo, se ne).[2][3][4] In the dialects of Arezzo, Umbria and Rome and in much of the north and south the form is se, reduced to s’ or as in Emilian and Romagnol.[5]

Etymology

The pronoun is inherited from Latin sē (“himself, herself, itself, themselves”), the Latin reflexive pronoun: “si” is the unstressed clitic form beside the stressed sé.[6][7][5][8] GRADIT and Treccani add a probable influence of the dative sibi (“to oneself”).[9][10] The variant “se” arose by assimilation before other clitics with a vowel other than i.[7]

The same pronoun is French se, Occitan se, Catalan se, Spanish se, Portuguese se, Sardinian se and Romanian se.[11][1] In Romanian, Dalmatian, Italian, Rhaeto-Romance and southern French dialects it also serves as the reflexive of the first and second persons.[11]

Latin “sē” goes back to Proto-Indo-European *se (“oneself”); the long vowel comes from the stressed form.[12] Cognates include Gothic 𐍃𐌹𐌺 (sik) and Old Church Slavonic сѧ (sę).[12][13]

Earliest recorded meaning

The unstressed pronoun is first recorded in the Novellino, at the end of the 13th century, as the third-person reflexive, singular and plural.[6][7] The stressed sé is older, in the Ritmo bellunese of 1193–1196.[6]

Semantic evolution

Besides the reflexive and reciprocal uses, si took on an impersonal value (si dice che “they say that”) and a passive one, the si passivante (qui si vendono biglietti “tickets are sold here”).[7][9][2] In older and bureaucratic Italian it could follow a finite verb, as in Manzoni's placossi “he calmed down” or the notice affittansi camere “rooms to let”.[4]

In north-western Tuscany, around Grosseto, in Umbria, in Rome and in the north, si is also used for the first person plural (si laviamo “we wash”); the use is documented in Siena from 1260.[5] DEI suggests a northern origin, a form like Tuscan ci that became se and merged with the reflexive, with Tuscan si va “we go, let's go” as another starting point.[5] Familiar Tuscan still uses it this way.[14][1]

Timeline

  • 1193–1196 – The stressed sé appears in the Ritmo bellunese.[6]
  • 1260 – Si for the first person plural is documented in Sienese.[5]
  • Late 13th century – The unstressed si appears in the Novellino.[6]

Meanings

Pronoun

  1. Unstressed reflexive pronoun of the third person, singular and plural, as direct object: himself, herself, itself, themselves: Marco si guarda allo specchio.[9][2][4]
  2. As indirect object, to or for oneself: Si è tolta le scarpe.[9][4][3]
  3. With pronominal verbs, without a reflexive sense: pentirsi, arrabbiarsi.[9][4][2]
  4. Reciprocal: each other, one another: I due fratelli si somigliano molto.[9][1]
  5. Intensive, stressing the subject's involvement: Si è bevuto tre caffè.[9][2][10]
  6. Impersonal: one, people, you: In questo ristorante si mangia bene.[2][14][1]
  7. Forming the passive (si passivante): Da qui si vedono le montagne.[9][3][1]
  8. (regional, Tuscany and Rome) Used for ci in the first person plural: noi si va al mare.[5][1]

si2 musical note

Confidence
Established
Formation
Borrowing, Acronym
First attested
1695, Giovanni Andrea Bontempi
From
Latin sanctus
Etymology tree of si2
inherited borrowed derived
Latin sanctus
French saint
Italian santo
Italian si
Derived words · si2
Latin sancte ← sanctus
Latin sanctitas ← sanctus

Pronunciation

Forms

si m (invariable)[1]

Etymology

The note name is from Medieval Latin Sancte Iohannes “O Saint John” reduced to its initials: these are the words that end the first stanza of the hymn to Saint John the Baptist, “Ut queant laxis”, attributed to Paul the Deacon.[6][7][3][9] Guido d'Arezzo (about 997 – about 1050) took the names of the notes from the syllables of this hymn.[3][15] His system had six syllables;[15] “si” was added later as the seventh.[15] Nocentini classes it as a borrowing from Latin.[7]

Earliest recorded meaning

DELI's first record is in the music theorist Giovanni Andrea Bontempi in 1695, for the last of the seven notes;[6][15] Bontempi describes how Si was added to Guido's six syllables.[6][15] Nocentini, GRADIT, Devoto–Oli and Sabatini–Coletti date the word to 1805.[7][9][2][3]

Semantic evolution

In the Latin countries si is the seventh note of the scale of C;[15] Germany uses the letter H for it and the English-speaking countries B, from the older notation by letters.[15] The name was borrowed as French si in the 17th century, English si (1728) and German Si (1732).[16]

Timeline

  • 11th century – Guido d'Arezzo names the notes from the hymn Ut queant laxis.[3][15]
  • 1695 – Bontempi uses si for the seventh note.[6][16]
  • 1728 – English si is first recorded.[16]
  • 1732 – German Si is first recorded.[16]
  • 1805 – The date of first record in GRADIT and Nocentini.[9][7]

Meanings

Noun

  1. (music) The seventh note of the scale of C in the solmization used in Latin countries, the note B: un concerto in si bemolle.[9][2][3]
  2. (music) The string or key of an instrument that gives this note.[9][3]
  3. (music) The key that has this note as its tonic: una sonata in si minore.[9]

Usage notes

In combination with other clitics si follows mi, ti, gli, ci and vi (mi si è rotto) and precedes ne as se (se ne va).[4][3] The adverb of affirmation is written sì, with an accent; it comes from Latin sīc (“so, thus”), as did Old Italian si “so” and the copulative si “and” of early texts.[17][5] GDLI also records an old si as the name of the letter s.[15]

References

  1. ^ a b c d e f g h i j Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h Devoto, Giacomo; Oli, Gian Carlo; Serianni, Luca; Trifone, Maurizio (2026), Nuovo Devoto–Oli: il vocabolario dell'italiano contemporaneo, digital ed., Milano: Le Monnier
  3. ^ a b c d e f g h i j Sabatini, Francesco; Coletti, Vittorio; Manfredini, Manuela (2026), Dizionario italiano Sabatini Coletti, digital ed., Milano: Sansoni / Rizzoli Larousse
  4. ^ a b c d e f Zingarelli, Nicola (2009), Lo Zingarelli 2010: vocabolario della lingua italiana, Bologna: Zanichelli
  5. ^ a b c d e f g Battisti, Carlo; Alessio, Giovanni (1950–1957), Dizionario etimologico italiano, 5 vols., Firenze: Barbèra (reprint 1975), p. 3487
  6. ^ a b c d e f g h i Cortelazzo, Manlio; Zolli, Paolo (1999), Dizionario etimologico della lingua italiana, 2nd ed. by Manlio Cortelazzo and Michele A. Cortelazzo, Bologna: Zanichelli
  7. ^ a b c d e f g h Nocentini, Alberto; Parenti, Alessandro (2010), l'Etimologico: vocabolario della lingua italiana, Firenze: Le Monnier
  8. ^ Battaglia, Salvatore; Bàrberi Squarotti, Giorgio (1961–2002), Grande dizionario della lingua italiana, 21 vols., Torino: UTET; digital ed. Accademia della Crusca
  9. ^ a b c d e f g h i j k l m n De Mauro, Tullio (ed.) (2003), Grande dizionario italiano dell'uso, CD-ROM version 2.0, Torino: UTET
  10. ^ a b Vocabolario della lingua italiana Treccani (2011), Roma: Istituto della Enciclopedia Italiana
  11. ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
  12. ^ a b de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  13. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  14. ^ a b Gabrielli, Aldo (2020), Grande dizionario italiano, digital ed., Milano: Hoepli
  15. ^ a b c d e f g h i Battaglia, Salvatore; Bàrberi Squarotti, Giorgio (1961–2002), Grande dizionario della lingua italiana, 21 vols., Torino: UTET; digital ed. Accademia della Crusca, p. 18, 1041
  16. ^ a b c d Stammerjohann, Harro, et al. (2008), Dizionario di italianismi in francese, inglese, tedesco, Firenze: Accademia della Crusca; online at difit.italianisticaonline.it
  17. ^ Prati, Angelico (1951), Vocabolario etimologico italiano, Milano: Garzanti, p. 916

Derived terms

Related etymologies

  • no · also from Latin
  • cosa · also from Latin
  • a · also from Latin
  • mio · also from Latin
  • uno · also from Latin
  • sapere · also from Latin
  • fare · also from Latin
  • e · also from Latin
Cite this entry

“Si.” Etymologically, 21 Oct. 2026, etymologically.com/it/si. Accessed 22 Oct. 2026.

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