Etymology and origin of the Portuguese word jurar
- Confidence
- Established
- Formation
- Inherited
- First attested
- 1200s the cantigas More words from the 13th century
- Inherited from
- Latin juro
- Ultimate origin
- Latin jūs
Pronunciation
Forms
jurar (first-person singular present juro, first-person singular preterite jurei, past participle jurado)[1] Houaiss records iurar (1152), jurauõ (14th century) and jurarom (1392) among the medieval forms.[2]
Etymology
It is inherited from Latin jūrō (“to swear, take an oath”), written Old Galician-Portuguese jurar in the oldest texts.[2][3][4][1] The Latin verb is formed on jūs in its old sense of a ritual formula with the force of law.[5][6] Wiktionary traces it ultimately to Proto-Indo-European *h₂yew-.[1]
The same Latin verb is Galician xurar, Spanish jurar, Catalan jurar, French jurer, Italian giurare and Romanian jura.[7][1]
Earliest recorded meaning
Houaiss's first date, 1152, comes from Machado's records.[2] Cunha dates the word to the 13th century.[3] In the cantigas it is the swearing of an oath: Afonso X writes juro par Deus lo santo / que manto / non tragerei “I swear by holy God that I will wear no cloak”, and the Crónica Troiana has uos juro parlos deuses “I swear to you by the gods”.[8]
Semantic evolution
The medieval lyric already has set phrases: jurar a finas e a fio “to swear firmly, without hesitation” in a cantiga of Afonso X.[8] Bluteau (1712–1728) defines the verb as affirming or denying with an oath and lists jurar falso “to swear falsely”.[9] Morais (1789) records jurar alguém por seu Rei “to acknowledge someone as king by oath and bind oneself to obey him”.[10] The sense “to curse, utter oaths” is in Houaiss, Priberam and Schlee's dictionary of Rio Grande do Sul.[2][11][12]
Timeline
- 1152 – iurar, the first date Houaiss gives.[2]
- 13th century – the cantigas of the Cancioneiro da Ajuda and of Afonso X.[8][3]
- 1393 – the spelling jurar.[2]
- c. 1430 – the Horto do Esposo (copied 1390–1437) uses the word.[13]
- 1712 – Bluteau lists jurar falso.[9]
- 1789 – Morais records jurar alguém por seu Rei.[10]
Meanings
Verb
- To swear, to declare or promise under oath: Jurou que tinha dito a verdade.[2][14][1]
- (intransitive) To take an oath: jurar sobre os Evangelhos.[2][11]
- To assert firmly, to assure: Juro que não fui eu.[2][14]
- To declare publicly (love, hatred, loyalty): jurar fidelidade.[2]
- jurar em To trust completely in (what someone says).[2]
- To recognise by oath: jurar alguém por rei.[2][10]
- To invoke (a sacred name): jurar o nome de Deus em vão.[2][14]
- To curse, to utter imprecations.[2][11][12]
Word family
- jura
- jurado
- jurador
- juramento
- juramentar
Related words
Usage notes
A dialect survey of 1974 records jurar “to earn interest” in Portugal.[15]
References
- ^ a b c d e f g h i Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h i j k l m n Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. jurar
- ^ a b c Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. jurar
- ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. jurar
- ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. iūrō
- ^ Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
- ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
- ^ 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. jurar
- ^ 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. jurar
- ^ a b c 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. 1, 748
- ^ a b c Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. jurar
- ^ a b Schlee, Aldyr Garcia (2019), Dicionário da Cultura Pampeana Sul-Rio-Grandense, 2 vols., Pelotas: Fructos do Paiz, p. s.v. jurar
- ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. jurar
- ^ a b c Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. jurar
- ^ Instituto da Lingua Galega, Tesouro do léxico patrimonial galego e portugués (TLPGP), Santiago de Compostela: Universidade de Santiago de Compostela, https://ilg.usc.gal/tesouro, p. s.v. jurar
Related etymologies
Cite this entry
“Jurar.” Etymologically, 15 Nov. 2026, etymologically.com/pt/jurar. Accessed 16 Nov. 2026.
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