Etymology and origin of the Portuguese word irmão
- Confidence
- Established
- Formation
- Inherited
- First attested
- 1259 a Galician-Portuguese document, spelt irmaao More words from the 13th century
- Inherited from
- Latin germanus
- Ultimate origin
- Latin germen
Etymology tree
Pronunciation
Forms
irmão m (plural irmãos, feminine irmã, feminine plural irmãs)[1] 13th-century documents write irmaao, yrmão, hirmaa (feminine) and ermano.[2][3][4]
Etymology
It is inherited from Latin germānus (“brother”), short for frāter germānus “brother of the same parents”, in which the adjective meant “of the same stock, true”.[4][1][5] The adjective is derived from germen (“sprout; offspring”).[4][1] The 13th-century texts have Old Galician-Portuguese irmão and Old Galician-Portuguese ermano.[4][3]
The loss of the initial /ʒ/ is explained by Houaiss and Nascentes as a result of phrase phonetics: the noun was almost always preceded by a possessive, as in meu germano, so its first consonant stood between vowels and fell as such consonants did, giving *ermão and then the modern form.[4][5] Houaiss also explains why the Latin frāter was not continued for “brother”: its descendant frade specialised in the religious sense.[4]
The same Latin word is Galician irmán, Spanish hermano, Catalan germà and Mirandese armano.[1][6] Spanish has it from a document of 938, spelt Old Spanish iermano.[7][8] Portuguese also has the learned doublet germano and the Spanish loan hermano.[1]
The Latin noun goes back to *ǵénh₁mn̥ (“offspring, seed”), from *ǵenh₁- (“to beget”).[1] Houaiss derives it from an earlier *genmen by dissimilation.[4]
Earliest recorded meaning
Galician-Portuguese documents have Garcia Meendez clerigo sou irmaao in 1259, et meu yrmão in 1269 and eu un cũ meus yrmaos “I, one of my brothers” in 1269;[2] sua hirmaa “his sister” appears in 1260.[2] In the Cantigas de Santa Maria the word is also used of fellow Christians: crischão te faz e irmão nosso “makes you a Christian and our brother”.[2]
Semantic evolution
Besides the family sense, the medieval language already used irmão for a fellow believer.[2] Cunha's definition adds the member of a confraternity.[3] Barbosa (1611) distinguishes the irmão inteyro de pay, e may “full brother”, and Cardoso (1569) gives Latin frater.[9][10] Later senses are a lay brother in a religious order, a member of the Freemasons, a title used between Christian sovereigns or by the pope to bishops, and, informally, a form of address.[4][11] As an adjective it means “similar, matching”, of people or things.[4]
Timeline
- 1259 – irmaao in a Galician-Portuguese document.[2]
- 1260 – the feminine hirmaa.[2]
- 13th century – irmão in the Cantigas de Santa Maria; the derivative coirmaão.[2][3]
- 14th century – first record of irmandade, spelt yrmandade.[3]
- 1496 – first occurrence in the CTA corpus, in the História de mui nobre Vespasiano.[12]
- 1611 – Barbosa defines irmão inteyro de pay, e may.[9]
- 17th century – first records of irmanar and desirmanar.[3]
Meanings
Noun
- A brother: a son of the same parents, or of the same father or mother only, in relation to their other children; in the plural, siblings.[4][11][1]
- A person one is bound to by a common purpose or by fellow feeling; a close friend.[4][1]
- A fellow member of a party or doctrine, correligionário.[4][11]
- A member of a confraria or irmandade; a freemason.[4][11]
- (religion) A lay brother who has taken vows but not holy orders; a friar without higher office.[4][11]
- (informal) A form of address: Tudo bem, irmão?[4][1]
Adjective
- Similar in form, origin or nature to another person, animal or thing: kindred souls.[4]
Word family
- coirmão
- irmanar
- desirmanar
- irmanação
- irmandade
- irmãozinho
Related words
Usage notes
Set phrases include irmão de leite or irmão colaço, a child nursed by the same wet nurse, irmão de armas, a comrade in arms, and irmão uterino and irmão consanguíneo for half-brothers on the mother's or the father's side.[4]
References
- ^ a b c d e f g h i j k l m Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ 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. irmão
- ^ a b c d e f Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. irmão
- ^ 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. irmão
- ^ a b Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. irmão
- ^ García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954), p. s.v. germanus
- ^ Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 3, 347
- ^ Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. hermano
- ^ a b Barbosa, Agostinho (1611), Dictionarium lusitanicolatinum, Braga: Fructuoso Lourenço de Basto (CLP transcription, Universidade de Aveiro), p. s.v. irmão
- ^ Cardoso, Jerónimo (1569–1570), Dictionarium ex lusitanico in latinum sermonem, Lisboa: João Álvares (CLP transcription, Universidade de Aveiro), p. s.v. irmão
- ^ a b c d e Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. irmão
- ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. irmão
Related etymologies
Cite this entry
“Irmão.” Etymologically, 15 Nov. 2026, etymologically.com/pt/irm%C3%A3o. Accessed 16 Nov. 2026.
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