Etymologically

Etymology and origin of the Portuguese word sim

Confidence
Established
Formation
Inherited
First attested
1200s as si More words from the 13th century
Inherited from
Latin sic
Ultimate origin
Latin sīc
Etymology tree
inherited borrowed derived
Latin sī
Romanian să
Spanish si
Latin sīc
Aromanian shi
French si
Italian sì
Portuguese assim
Portuguese sim
Romanian și
Spanish sí
English sic
From the same root
Italian quasi ← sī
Latin etiamsī ← sī
Latin etsī ← sī
Latin nisi ← sī
Latin quasi ← sī
Latin sīcubi ← sī
Latin sīn ← sī
Latin sīquidem ← sī
Latin sīve ← sī
Latin sōdēs ← sī
Romanian sau ← să
Latin sīcine ← sīc
Latin sīcut ← sīc
Spanish así ← sīc
French sinon ← si
Italian sissignore ← sì
Romanian același ← și
Romanian deși ← și
Romanian iarăși ← și
Romanian totuși ← și

Pronunciation

  • Brazil: /ˈsĩ/[1]
  • Portugal: /ˈsĩ/[1]

Forms

sim[1] The medieval forms were si and sy.[2] Bluteau (1712–1728) still sends the reader from sim to si.[3]

Etymology

It is inherited from Latin sīc (“thus, in this way”), written Old Galician-Portuguese si and Old Galician-Portuguese sy in the oldest texts.[4][2][1][5] The Latin adverb was a locative of an old demonstrative stem with the particle -ce.[6] It served as a word for “yes” in Italian, Sardinian, Spanish and Portuguese.[7]

The nasal vowel of the modern word is not medieval, and the sources explain it in different ways.[8][4] Nunes and the older tradition put it down to its opposite, Old Galician-Portuguese nom (today não); Wiktionary names the same word or mim.[8][4][1] Nascentes saw instead the Portuguese habit of nasalising a stressed final -i, as in alfenim, benjoim, carmesim and rubim, and Machado the quality of the -i itself.[5][4]

The same Latin word is Galician si, Spanish sí, Catalan sí, Italian sì, French si and Romanian și (“and”).[7][1]

Earliest recorded meaning

Cunha dates si and sy to the 13th century.[2] In the Miragres de Santiago someone asks whether Our Lady is dead, and Saint Peter answers Si.[9] Nascentes quotes Senhor, si from the Livro de Linhagens.[8]

Semantic evolution

The nasal form is recorded from the 16th century; the Livro dos Mártires of 1513 has it.[4][10] Morais (1813) notes that si was once said for sim, and sim for the pronoun si.[11] Folqman (1755) explains that Latin had no one word for it and answered with the verb of the question, and has hum dia sim, outro não “every other day”.[12]

Besides the answer “yes”, the word stresses an assertion, warns ironically, shows impatience when repeated, and picks up a topic after a break.[4] As a noun o sim is consent, especially to a marriage.[4][13]

Timeline

  • 13th century – si and sy.[2]
  • 1513 – sim in the Livro dos Mártires.[10]
  • 16th century – Houaiss's first record of the nasal form.[4]
  • 1697 – Pereira glosses Sim with Latin etiam and maxime.[14]
  • 1712–1728 – Bluteau refers sim to si.[3]
  • 1755 – Folqman has hum dia sim, outro não.[12]
  • 1813 – Morais records responder de sim.[11]

Meanings

Adverb

  1. yes; expresses agreement, approval or consent: Queres vir? – Sim.[4][15][1]
  2. Stresses or repeats an assertion: Isso é verdade, sim.[4][1]
  3. (ironic) Warns against an intention: Sim, continua e vais ver.[4][13]
  4. (repeated) Shows impatience: Sim, sim, já percebi.[4]
  5. Resumes a topic after a break, like bem or ora.[4][16]

Noun

  1. A yes; consent: Esperou meses pelo sim dela.[4][15][1]

Usage notes

Set phrases are dar o sim “to consent, especially to marry”, pelo sim, pelo não “just in case” and pois sim, which agrees or, ironically, doubts.[4] The plural is sins.[1]

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 Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. sim
  3. ^ a b Bluteau, Raphael (1712–1728), Vocabulario portuguez e latino, 8 vols. + 2 supplement vols., Coimbra / Lisboa (CLP transcription, Universidade de Aveiro), p. s.v. sim
  4. ^ a b c d e f g h i j k l m n o Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. sim
  5. ^ a b Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. sim
  6. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. sīc
  7. ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. s.v. sic
  8. ^ a b c Nascentes, Antenor (1955), Dicionário etimológico da língua portuguesa, vol. 1: Nomes comuns, Rio de Janeiro (1st ed. 1932, preface by W. Meyer-Lübke), p. s.v. sim
  9. ^ Instituto da Lingua Galega, Dicionario de dicionarios do galego medieval (DDGM), ed. Ernesto González Seoane, Santiago de Compostela: Universidade de Santiago de Compostela, https://ilg.usc.gal/ddgm, p. s.v. si
  10. ^ a b Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. sim
  11. ^ a b Silva, António de Morais (1813), Diccionario da lingua portugueza, 2nd ed., 2 vols., Lisboa: Typographia Lacerdina, p. 2, 700
  12. ^ a b Folqman, Carlos (1755), Diccionario portuguez, e latino, Lisboa: Régia Officina Silviana (CLP transcription, Universidade de Aveiro), p. s.v. sim
  13. ^ a b Michaelis: Moderno Dicionário da Língua Portuguesa, São Paulo: Melhoramentos (online as Michaelis Dicionário Brasileiro da Língua Portuguesa, https://michaelis.uol.com.br), p. s.v. sim
  14. ^ Pereira, Bento (1697), Thesouro da lingoa portuguesa, in the 1697 edition of his Prosodia (1st ed. 1647; CLP transcription, Universidade de Aveiro), p. s.v. sim
  15. ^ a b Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. sim
  16. ^ Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. sim

Related etymologies

Cite this entry

“Sim.” Etymologically, 15 Nov. 2026, etymologically.com/pt/sim. Accessed 16 Nov. 2026.

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