Etymologically

Etymology and origin of the Portuguese word mentir

Confidence
Established
Formation
Inherited
First attested
1200s More words from the 13th century
Inherited from
Latin mentior
Ultimate origin
Latin mens
Etymology tree
inherited borrowed derived
Latin mēns
Aromanian minti
Italian -mente
Italian mente
Portuguese mente
Romanian minte
Catalan ment
Spanish mente
Latin mentior
Portuguese mentir
Romanian minți
Spanish mentir
Italian mentire
From the same root
Latin āmēns ← mēns
Latin dēmēns ← mēns
Latin mentālis ← mēns
Latin mentiō ← mēns
Romanian aminte ← mēns
Italian altrimenti ← -mente
Italian assolutamente ← -mente
Italian certamente ← -mente
Italian chiaramente ← -mente
Italian completamente ← -mente
Italian decisamente ← -mente
Italian direttamente ← -mente
Italian esattamente ← -mente
Italian facilmente ← -mente
Italian finalmente ← -mente
Italian immediatamente ← -mente
Italian lentamente ← -mente
Italian naturalmente ← -mente
Italian ovviamente ← -mente
Italian perfettamente ← -mente
Italian praticamente ← -mente
Italian probabilmente ← -mente
Italian semplicemente ← -mente
Italian seriamente ← -mente
Italian sicuramente ← -mente
Italian solamente ← -mente
Italian specialmente ← -mente
Italian ultimamente ← -mente
Italian velocemente ← -mente
Italian veramente ← -mente
See all derived words →

Pronunciation

  • Brazil: /mẽˈt͡ʃi(ʁ)/, [mẽˈt͡ʃi(h)], /mĩˈt͡ʃi(ʁ)/[1]
  • São-Paulo: /mẽˈt͡ʃi(ɾ)/, /mĩˈt͡ʃi(ɾ)/[1]
  • Rio-de-Janeiro: /mẽˈt͡ʃi(ʁ)/, [mẽˈt͡ʃi(χ)], /mĩˈt͡ʃi(ʁ)/[1]
  • Caipira: /mẽˈt͡ʃi(ɻ)/, /mĩˈt͡ʃi(ɻ)/[1]

Forms

mentir (first-person singular present minto, third-person singular present mente, first-person singular preterite menti, past participle mentido)[1] Houaiss records metir and mintyr in the 14th century.[2] The cantigas have the first person menço and the subjunctive mença, beside the later minto.[3] Feijó (1734) prescribes mentir, not mintir.[4]

Etymology

It is inherited from Latin mentior (“to lie”), through the active infinitive that Late Latin used in place of the deponent, written Old Galician-Portuguese mentir in the oldest texts.[2][5][6][1] Forms with /i/ in the first syllable, such as the 14th-century mintyr, show the /e/ assimilated to the stressed /i/, as Nunes explained.[7][2]

The same Latin word is Galician mentir, Spanish mentir, Catalan mentir, French mentir and Italian mentire.[8][1]

The Latin verb is derived from mēns (“mind”);[9][1][5] Wiktionary explains the sense “to lie” from “to be inventive, to imagine”, and traces the noun to Proto-Indo-European *méntis.[9][1][5]

Earliest recorded meaning

The verb is recorded from the 13th century.[2][5] In the cantigas d'amigo it is intransitive, and por non mentir and sen todo mentir mean “to tell the truth, frankly”;[3][10] Universo Cantigas also gives a transitive sense “to deceive, break an agreement”.[3][10]

Semantic evolution

Bluteau (1712–1728) explains it as saying the opposite of what one has in mind.[11] Morais (1789) adds the senses “to fail, disappoint”, said of a hope, and “to feign”.[12] Modern dictionaries keep “to fail, not to thrive” for plants and “to degenerate” in phrases such as bom sangue não mente; the DLP adds technical senses in carpentry and of a boat that does not answer the helm.[2][13][14] From São Paulo to Rio Grande do Sul queimar campo is a synonym.[15]

Timeline

  • 13th century – first record.[2][5]
  • 14th century – the spellings metir and mintyr.[2]
  • 1611 – Barbosa renders it by Latin mentior.[16]
  • 1734 – Feijó rejects the spelling mintir.[4]

Meanings

Verb

  1. To lie, to say what one knows to be false: Não me mintas![2][17][1]
  2. To deceive, to give a false impression: As aparências mentem.[2][15][1]
  3. To hide the truth about: mentir o salário.[2]
  4. To fail to keep a duty or promise: mentir à palavra.[2][13]
  5. (figurative) To fail, not to thrive; to lose one's true quality.[2][17][1]

Word family

  • mentira
  • mentiroso
  • desmentir
  • desmentido

References

  1. ^ a b c d e f g h i j k l Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. mentir
  3. ^ a b c 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. mentir
  4. ^ a b Feijó, João de Morais Madureira (1734), Orthographia, ou Arte de escrever, e pronunciar com acerto a lingua portugueza, Lisboa (CLP transcription, Universidade de Aveiro), p. s.v. mentir
  5. ^ a b c d e Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. mentir
  6. ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. mentir
  7. ^ Nascentes, Antenor (1955), Dicionário etimológico da língua portuguesa, vol. 1: Nomes comuns, Rio de Janeiro (1st ed. 1932, preface by W. Meyer-Lübke), p. 1, 327
  8. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 5510
  9. ^ 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, p. s.v. mēns
  10. ^ a b Universo Cantigas: Glosario da poesía medieval profana galego-portuguesa, A Coruña: Instituto da Lingua e Literatura (ILLA), Universidade da Coruña, https://www.universocantigas.gal, p. s.v. mentir
  11. ^ Bluteau, Raphael (1712–1728), Vocabulario portuguez e latino, 8 vols. + 2 supplement vols., Coimbra / Lisboa (CLP transcription, Universidade de Aveiro), p. s.v. mentir
  12. ^ Silva, António de Morais (1789), Diccionario da lingua portugueza composto pelo padre D. Rafael Bluteau, reformado, e accrescentado, 2 vols., Lisboa: Simão Thaddeo Ferreira, p. 2, 74
  13. ^ a b Aulete, Francisco Júlio Caldas, Dicionário contemporâneo da língua portuguesa (1st ed. 1881), online as Aulete Digital, Rio de Janeiro: Lexikon, https://aulete.com.br, p. s.v. mentir
  14. ^ Academia das Ciências de Lisboa, Dicionário da Língua Portuguesa, revised online edition (2023–) of the Dicionário da Língua Portuguesa Contemporânea (2001), https://dicionario.acad-ciencias.pt, p. s.v. mentir
  15. ^ a b Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. mentir
  16. ^ Barbosa, Agostinho (1611), Dictionarium lusitanicolatinum, Braga: Fructuoso Lourenço de Basto (CLP transcription, Universidade de Aveiro), p. s.v. mentir
  17. ^ a b Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. mentir

Related etymologies

Cite this entry

“Mentir.” Etymologically, 15 Nov. 2026, etymologically.com/pt/mentir. Accessed 16 Nov. 2026.

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