Etymologically

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
inherited borrowed derived
Latin iūs
French jus
Latin iūstus
Italian giusto
Portuguese justo
Spanish justo
English just
French juste
Romanian just
From the same root
Latin iniūriā ← iūs
Latin iūdex ← iūs
Latin iure ← iūs
Latin iūrgō ← iūs
Latin iūriscōnsultus ← iūs
Latin iūrisdictiō ← iūs
Latin iūrisprūdentia ← iūs
Latin iūrō ← iūs
Latin iūsiūrandum ← iūs
Latin iūstitium ← iūs
Latin periūrus ← iūs
Dutch juist ← iūstus
Latin iniūstus ← iūstus
Latin iuste ← iūstus
Latin iūstificō ← iūstus
Latin iūstitia ← iūstus
Romanian justiție ← iūstus
Italian giustezza ← giusto
English unjust ← just
French ajuster ← juste
French justement ← juste

Pronunciation

  • Brazil: /ˈʒus.tu/[1]
  • Rio-de-Janeiro: /ˈʒuʃ.tu/[1]
  • Portugal: /ˈʒuʃ.tu/[1]

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

  1. In accordance with justice, fairness and reason: uma decisão justa.[2][16][1]
  2. Fair, impartial, upright: of a person who judges and acts with equity.[2][16]
  3. Due, deserved: um castigo justo.[2][14]
  4. Well founded, legitimate.[2][16]
  5. Exact, precise: a palavra justa.[2][16]
  6. Fitting, appropriate; conforming to a norm or model.[2][17]
  7. tight, close-fitting: umas calças justas.[2][16][1]
  8. Agreed upon, settled.[2][17]
  9. (music) Of the fourth, fifth and octave: perfect.[2][16]

Noun

  1. (theology) A righteous person, one in a state of grace.[2][14][1]
  2. A person who lives by the rules of justice and morals.[2][16]

Adverb

  1. Exactly, precisely; just at that moment.[2][16]
  2. In the right amount, just enough.[2]

Word family

  • ajustar
  • ajuste
  • justeza
  • desajustado

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

  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 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
  3. ^ a b c Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. justo
  4. ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. justo
  5. ^ Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 3, 542
  6. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 4635
  7. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  8. ^ 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
  9. ^ 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
  10. ^ 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
  11. ^ 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
  12. ^ Silva, António de Morais (1813), Diccionario da lingua portugueza, 2nd ed., 2 vols., Lisboa: Typographia Lacerdina, p. 2, 196
  13. ^ 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
  14. ^ 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
  15. ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. justo
  16. ^ 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
  17. ^ 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.

Last edited on . ·