Etymologically

Etymology and origin of the Portuguese word falsar

Confidence
Disputed
Formation
Derivation
First attested
1200s Cantigas de Santa Maria More words from the 13th century
Ultimate origin
Latin fallō
Etymology tree
inherited borrowed derived
Latin fallō
Italian fallare
Italian fallire
Italian fallo
Latin falsus
Catalan fals
French faux
English faux
Italian falso
Romanian fals
Portuguese falso
Portuguese falsar
Spanish falso
English false
From the same root
Latin fallāx ← fallō
Latin refellō ← fallō
Latin falsificō ← falsus
Latin falsō ← falsus
Latin falsum ← falsus
English falsehood ← false

Pronunciation

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

Forms

falsar (first-person singular present falso, first-person singular preterite falsei, past participle falsado)[1]

Etymology

Houaiss and the DLP see it as a verb formed in the language, from Portuguese falso + -ar.[2][3] Aurélio, Vieira and Figueiredo derive it instead from Late Latin falsō (“to falsify”), and Nascentes takes it for a learned word from the Latin verb.[4][5][6][7] Wiktionary leaves both explanations open, and so does the glossary of the Crónica Geral.[1][8] Meyer-Lübke thought the Spanish and Portuguese verb a loan from Occitan and Catalan falsar.[9] The old form is Old Galician-Portuguese falsar, also written Old Galician-Portuguese ffalssar.[1][2]

The Latin verb is formed on falsus (“false”), the past participle of fallō (“to deceive”).[1] The Latin verb also gave Spanish falsar, Catalan falsar, French fausser and Italian falsare.[9][10]

Earliest recorded meaning

The verb first appears inside Latin: charters of 1172 and 1174 fine anyone who falsifies measures (qui illas falsauerit).[8] The first vernacular record is in the Cantigas de Santa Maria of the 13th century, where it means “to pierce, break”: ca lle falssou os costados a saeta que de forte baesta fora tirada “for the arrow shot from a strong crossbow pierced his sides”.[8][1] Viterbo quotes the foral of Tomar of 1174 in a vernacular version of the early 14th century: Se alguém medidas, ou covedos falsar, peyte V. ss. “if anyone falsifies measures or cubits, let him pay five solidi”.[11]

Semantic evolution

The Crónica Geral uses the verb for breaking through shields and armour (falsou o escudo) and for breaking an agreement (falsarõ a postura).[8] The sense “to lie, break one's promise” is recorded in the 16th century, and “to frustrate” in a moral sense also appears.[11] Bluteau has falsar sinal, ou sello del-Rey “to forge the King's seal”, a crime that the Ordinances punished with death, a term of the game of péla for a false bounce, and falsar o pé “to set one's foot wrong”.[12] Viterbo noted in 1798 that in his day falsar meant “to strike wrongly, miss”.[11] The modern dictionaries add “to give way, begin to crack” of a wall, and “to sing or play out of tune”.[2][4]

Timeline

  • 1172 – a Latin charter has falsadas of falsified measures.[8]
  • 13th century – falssou “pierced” in the Cantigas de Santa Maria.[8][2]
  • 14th century – the spelling ffalssar.[2]
  • 1569 – Cardoso renders falsar with Latin adultero.[13]
  • 1611 – Barbosa glosses it “to deceive”.[14]
  • 1712–1728 – Bluteau records the sense in the game of péla.[12]
  • 1734 – Feijó defines it as dar em falso “to strike wrongly”.[15]

Meanings

Verb

  1. (transitive) To cheat someone in weight or measure.[2][4][1]
  2. (transitive) To weigh or measure with false means; to falsify, adulterate.[2][4][16]
  3. (transitive) To break by force or through a weak point; to pierce.[2][4]
  4. (transitive) To make void; to frustrate, thwart.[2][4]
  5. (intransitive) To tell falsehoods; to break one's promises; to lie.[2][16][1]
  6. (intransitive) To strike wrongly; to fail.[2][4]
  7. (intransitive) Of a wall, to begin to crack or give way.[2][17]
  8. (intransitive, music) To sing or play out of tune.[2][4]

References

  1. ^ a b c d e f g h i j k Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. falsar
  3. ^ 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. falsar
  4. ^ a b c d e f g h Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. falsar
  5. ^ Vieira, Frei Domingos (1871–1874), Grande Diccionario Portuguez ou Thesouro da lingua portugueza, 5 vols., Porto: Ernesto Chardron e Bartholomeu H. de Moraes, p. 3, 573
  6. ^ Figueiredo, Cândido de (1899), Novo diccionário da língua portuguesa, 1st ed., 2 vols., Lisboa: Tavares Cardoso & Irmão, p. s.v. falsar
  7. ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. falsar
  8. ^ a b c d e f 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. falsar
  9. ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 3170
  10. ^ García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954), p. s.v. falsare
  11. ^ a b c Viterbo, Joaquim de Santa Rosa de (1798–1799), Elucidario das palavras, termos e frases que em Portugal antiguamente se usárão, 2 vols., Lisboa: Simão Thaddeo Ferreira, p. 1, 426
  12. ^ 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. falsar
  13. ^ Cardoso, Jerónimo (1569–1570), Dictionarium ex lusitanico in latinum sermonem, Lisboa: João Álvares (CLP transcription, Universidade de Aveiro), p. s.v. falsar
  14. ^ Barbosa, Agostinho (1611), Dictionarium lusitanicolatinum, Braga: Fructuoso Lourenço de Basto (CLP transcription, Universidade de Aveiro), p. s.v. falsar
  15. ^ 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. falsar
  16. ^ a b Porto Editora (2013), Grande Dicionário da Língua Portuguesa, Porto: Porto Editora, p. 4163
  17. ^ 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. falsar
Cite this entry

“Falsar.” Etymologically, 15 Nov. 2026, etymologically.com/pt/falsar. Accessed 16 Nov. 2026.

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