Etymology and origin of the Portuguese word justo
- Confidence
- Established
- Formation
- Inherited
- First attested
- 1200s Cantigas de Santa Maria More words from the 13th century
- Inherited from
- Latin iustus
- Ultimate origin
- Proto-Indo-European *h₂yew-
Etymology tree
From the same root
Forms
justo (feminine justa, masculine plural justos, feminine plural justas, comparable, comparative mais justo, superlative o mais justo or justíssimo)[1]
Etymology
It is inherited from Latin iūstus (“lawful, just”), written Old Galician-Portuguese justo in the oldest texts.[2][3][4][1] Corominas sees no conclusive reason to treat the word as learned in any Romance language, except perhaps French.[5]
The same Latin word is Galician xusto, Spanish justo, Catalan just, French juste and Italian giusto.[6][1]
The Latin adjective is formed on iūs (“law, right”); an inscription has the old ablative iouestod.[7] De Vaan reconstructs Proto-Italic *jowesto- (“just”) and derives that noun from an s-stem of Proto-Indo-European *h₂oi-u (“vital force, eternity”);[8][1] Wiktionary gives the root as *h₂yew-.[8][1]
Earliest recorded meaning
Latin charters have Justus as a name in 933 and per precio iusto “at a fair price” in 1080.[9] In Galician-Portuguese it appears in the Cantigas de Santa Maria, which call Christ justo juyz “just judge”, and charters of 1336 and 1341 sell por justo preço “for a fair price”.[9] Houaiss and Cunha date it to the 13th century.[2][3]
Semantic evolution
The noun o justo “the righteous man” is in use from the 14th century: the Miragres de Santiago explain the name Justo as ome dereito “upright man”, and the Crónica Troiana says sol arder o justo porlo pecador “the just man often burns for the sinner”.[9] Bluteau (1712) gives “possessing justice”, “in accordance with justice” and “reasonable”.[10] Cunha's entry gives the senses “equitable”, “tight” and “virtuous man”.[3]
Justo was also a gold coin of King João II, named after its legend Justus ut palma florebit, minted from 1489.[11] Morais (1813) and Vieira give its value as 600 réis, the DLP as 380 reais brancos.[12][13][14] Kabuverdianu and Tetum have justu from Portuguese, and Indonesian justru.[1]
Timeline
- 933 – Justus as a personal name in a Latin charter.[9]
- 1080 – per precio iusto in a Latin charter.[9]
- 13th century – justo juyz in the Cantigas de Santa Maria.[9][2]
- 1336 – por justo preço in a charter.[9]
- 14th century – the noun justo in the Crónica Troiana and the Miragres de Santiago.[9]
- c. 1430 – the Horto do Esposo (copied 1390–1437) uses justo.[15]
- 1489 – João II has the gold coin justo minted.[11]
- 1712 – Bluteau's article.[10]
Meanings
Adjective
- In accordance with justice, fairness and reason: uma decisão justa.[2][16][1]
- Fair, impartial, upright: of a person who judges and acts with equity.[2][16]
- Due, deserved: um castigo justo.[2][14]
- Well founded, legitimate.[2][16]
- Exact, precise: a palavra justa.[2][16]
- Fitting, appropriate; conforming to a norm or model.[2][17]
- tight, close-fitting: umas calças justas.[2][16][1]
- Agreed upon, settled.[2][17]
- (music) Of the fourth, fifth and octave: perfect.[2][16]
Noun
- (theology) A righteous person, one in a state of grace.[2][14][1]
- A person who lives by the rules of justice and morals.[2][16]
Adverb
Word family
- ajustar
- ajuste
- justeza
- desajustado
Related words
Usage notes
Pagar o justo pelo pecador “the just man pays for the sinner” is said when the innocent are punished and the guilty go free, or when a whole group is punished for what some did.[2][14] Dormir o sono dos justos is “to sleep soundly”.[2][14]
References
- ^ a b c d e f g h i j k l Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h i j k l m n o p q r Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. justo
- ^ a b c Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. justo
- ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. justo
- ^ Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 3, 542
- ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 4635
- ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ 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
- ^ a b c d e f g h 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. justo
- ^ 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. justo
- ^ a b 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. 2, 65
- ^ Silva, António de Morais (1813), Diccionario da lingua portugueza, 2nd ed., 2 vols., Lisboa: Typographia Lacerdina, p. 2, 196
- ^ 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, 1231
- ^ a b c d e 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. justo
- ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. justo
- ^ a b c d e f g h Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. justo
- ^ a b Porto Editora (2013), Grande Dicionário da Língua Portuguesa, Porto: Porto Editora, p. 5514
Related etymologies
Cite this entry
“Justo.” Etymologically, 15 Nov. 2026, etymologically.com/pt/justo. Accessed 16 Nov. 2026.
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