Etymologically

Etymology and origin of the Portuguese word reino

Confidence
Established
Formation
Inherited
First attested
1200s More words from the 13th century
Inherited from
Latin regnum
Ultimate origin
Proto-Indo-European *h₃rḗǵs
Etymology tree
inherited borrowed derived
Latin rēx
French roi
Italian re
Portuguese rei
Spanish rey
English rex
Romanian rege
Latin rēgnum
Portuguese reino
Italian regno
Spanish reino
From the same root
French roitelet ← rēx
French vice-roi ← rēx
Latin rēgālis ← rēx
Latin rēgīna ← rēx
Latin rēgius ← rēx
Latin rēgulus ← rēx
Romanian regat ← rēx
Latin rēgnō ← rēgnum

Pronunciation

  • Brazil: /ˈʁej.nu/, [ˈheɪ̯.nu][1]
  • Rio-de-Janeiro: /ˈʁej.nu/, [ˈχeɪ̯.nu][1]
  • Portugal: /ˈʁɐj.nu/[1]
  • Northern, Portugal: /ˈʁej.nu/[1]

Forms

reino m (plural reinos)[1] In the 13th century the word was written reino, reyno and regno; later records have rejnos (1344), rregno (14th century) and reignos (15th century).[2][3] Houaiss also records an archaic form reame in the 15th century.[2]

Etymology

It is inherited from Latin rēgnum (“kingship, royal power; kingdom”), written Old Galician-Portuguese reino, Old Galician-Portuguese reyno and Old Galician-Portuguese regno in 13th-century texts.[2][3][1]

The same Latin word is Galician reino, Spanish reino, Italian regno and Catalan regne; French règne is a learned remaking of an older popular form.[1][4][5] The Latin noun is formed from rēx (“king”) with an adjective suffix -nus.[1] De Vaan traces it to Proto-Indo-European *h₃rḗǵs (“ruler, king”), the source of Sanskrit राजन् (rā́jan) and Old Irish rí as well.[6][1]

The regular outcome of Latin -gn- would have given *renho, as Nascentes notes.[7] He gives two explanations from the literature for the ⟨i⟩: the ⟨g⟩ was resolved into a vowel, as Leite de Vasconcelos and Nunes hold, or the word was influenced by rei, as Meyer-Lübke and Menéndez Pidal hold.[7] García de Diego also explains the Spanish and Portuguese form, in place of a regular *reno, by the influence of the word for “king”.[8] The old spelling ⟨regno⟩ is a Latinising one.[7]

Earliest recorded meaning

The Cantigas de Santa Maria speak of o reyno d'Aragon “the kingdom of Aragon” and of Paradise as o reino celestial “the heavenly kingdom”.[9] A cantiga d'escarnho of Afons' Eanes do Coton has o reino de Deus “the kingdom of God”.[9][10] The first records thus have both the political and the religious sense.[9]

Semantic evolution

Bluteau defined the word as one or more provinces subject to a king, and Morais added a state that once had its own king and was joined to another sovereign's realm.[11][12] In the colonial period o Reino meant Portugal itself, seen from Brazil and the other overseas lands, and Morais records reinol for a person who came from the Kingdom to the conquests.[2][12]

Natural history used the word for the great divisions of nature, reino animal, reino vegetal and reino mineral, and modern biology for the highest taxonomic rank.[2][13] In the north-east of Brazil reino is also a cheap mixture of parati spirit, and in the catimbó cults one of the divisions of the other world.[2][14] Silva Bastos records a Timor sense, a group of villages.[13] The word was borrowed into Tetum as reinu.[1]

Timeline

  • 13th century – first records, as reino, reyno and regno.[2][3]
  • 1344 – the spelling rejnos.[2]
  • 15th century – the spelling reignos and the archaic form reame.[2]
  • 1569 – Cardoso's dictionary translates reino as Latin regnum.[15]
  • 1712–1728 – Bluteau defines it as provinces subject to one king.[11]
  • 1789 – Morais records reinol, a person sent out from the Kingdom.[12]
  • 1912 – Silva Bastos gives the natural-history sense and a Timor sense.[13]

Meanings

Noun

  1. A kingdom: a country or state ruled by a king or queen; a monarchy (monarquia).[2][16][1]
  2. (historical) o Reino: Portugal, as opposed to colonial Brazil and the other overseas possessions.[2][16]
  3. The subjects of a monarchy as a whole.[2][16]
  4. (figurative) A realm or domain where someone or something rules, or a sphere or field.[2][16]
  5. Each of the great divisions of nature studied by the natural sciences: reino animal, reino vegetal, reino mineral.[2][17]
  6. (biology) The highest taxonomic rank.[2][1]
  7. (religion) reino de Deus, reino dos céus: the kingdom of God, eternal life.[2]
  8. (north-eastern Brazil) A cheap mixture of parati spirit.[2][14]

Word family

  • reinol
  • pimenta-do-reino

Usage notes

In Trás-os-Montes reino is also the name of a long beam of a mill.[18]

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 Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. reino
  3. ^ a b c Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. reino
  4. ^ Real Academia Española; Asociación de Academias de la Lengua Española (2014–), Diccionario de la lengua española, 23rd ed., online version 23.8, https://dle.rae.es, p. s.v. reino
  5. ^ Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert, p. s.v. règne
  6. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  7. ^ a b c Nascentes, Antenor (1955), Dicionário etimológico da língua portuguesa, vol. 1: Nomes comuns, Rio de Janeiro (1st ed. 1932, preface by W. Meyer-Lübke), p. 438
  8. ^ García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954), p. s.v. regnum
  9. ^ 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. reino
  10. ^ 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. reino
  11. ^ 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. reino
  12. ^ 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. 2, 314
  13. ^ a b c Silva Bastos, José Timóteo da (1912), Diccionario etymologico, prosodico e orthographico da lingua portugueza, Lisboa: Parceria António Maria Pereira, p. s.v. reino
  14. ^ a b Navarro, Fred (2004), Dicionário do Nordeste, São Paulo: Estação Liberdade, p. s.v. reino
  15. ^ Cardoso, Jerónimo (1569–1570), Dictionarium ex lusitanico in latinum sermonem, Lisboa: João Álvares (CLP transcription, Universidade de Aveiro), p. s.v. reino
  16. ^ a b c d Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. reino
  17. ^ Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. reino
  18. ^ 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. reino

Related etymologies

Cite this entry

“Reino.” Etymologically, 15 Nov. 2026, etymologically.com/pt/reino. Accessed 16 Nov. 2026.

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