Etymologically

Etymology and origin of the Portuguese word alheio

Confidence
Established
Formation
Inherited
First attested
1255 spelt aleno More words from the 13th century
Inherited from
Latin alienus
Ultimate origin
Proto-Indo-European *h₂el-io-
Etymology tree
inherited borrowed derived
Latin alius
Latin aliēnus
Portuguese alheio
Spanish ajeno
English alien
Italian alieno
From the same root
Latin alia ← alius
Latin aliās ← alius
Latin alibī ← alius
Latin aliō ← alius
Latin aliōquī ← alius
Latin aliter ← alius
Latin aliunde ← alius
Latin aliuta ← alius
Latin aliēnigena ← aliēnus
Latin aliēnigenus ← aliēnus
Latin aliēnō ← aliēnus
Latin alienum ← aliēnus

Pronunciation

  • Brazil: /aˈʎej.u/, [aˈʎeɪ̯.u][1]
  • Portugal: /ɐˈʎɐj.u/[1]
  • Northern, Portugal: /ɐˈʎej.u/[1]
  • Central, Portugal: /ɐˈʎej.u/[1]

Forms

alheio (feminine alheia, masculine plural alheios, feminine plural alheias)[1] Old Galician-Portuguese wrote aleno, aleo, alleo, alheo and alhẽo;[2][3] alheio is recorded from the 14th century.[2][3] Writers of the 16th century still spelt it alheo and alhea.[4]

Etymology

It is inherited from Latin aliēnus (“belonging to someone else; foreign”), written Old Galician-Portuguese aleno, Old Galician-Portuguese aleo and Old Galician-Portuguese alhẽo in the oldest texts.[2][3][5][1] Nascentes calls it a semi-learned outcome of the Latin word.[6] Vieira explains the sound changes: Latin /li/ before a vowel became the palatal ⟨lh⟩, as in filho and conselho, and the /n/ between vowels was lost, as in coroa.[7]

The same Latin word is Galician alleo, Spanish ajeno and Asturian ayenu.[8][1] Corominas notes that the Latin word left popular descendants only in Portuguese, Spanish and Sardinian.[9]

The Latin adjective is formed from alius (“other”), from *aljo-, from Proto-Indo-European *h₂el-io- (“another”).[10][1]

Earliest recorded meaning

Houaiss dates the first record, spelt aleno, to 1255, from Cunha's index of medieval Portuguese.[2] Machado quotes a document of 1262 from Portel: E quem caualo aleno caualgar por .j. dia peite .j. carneiro “and whoever rides another man's horse for one day shall pay one sheep”, with the word in its first sense, “belonging to someone else”.[5]

Semantic evolution

From “belonging to another” the word passed to “foreign, of another land” and “having nothing to do with the matter”, and then to a person “far from” or “indifferent to” something, all listed by Morais in 1789 with alheio de si “beside oneself”.[11][2] Vieira (1871) also gives the senses “ignorant of”, “absorbed” and “enraptured”, and Michaelis records “mad”.[7][12] As a masculine noun, o alheio is what belongs to others.[13][14]

Timeline

  • 1255 – first record, spelt aleno.[2]
  • 1262 – caualo aleno “another man's horse” in a document of Portel.[5]
  • 13th century – the spellings aleo, alleo, alheo and alhẽo.[2][3]
  • 14th century – the modern spelling alheio appears.[2]
  • 1504 – alhea in a private letter.[4]
  • 1789 – Morais lists alheio de si “beside oneself” and estar alheio “to be ignorant” of a subject.[11]
  • 1871 – Vieira explains the change of Latin -li- to ⟨lh⟩ and the loss of -n-.[7]

Meanings

Adjective

  1. Belonging to someone else; not one's own: Não mexas nas coisas alheias.[2][15][1]
  2. foreign, from another country or place; strange.[2][13][1]
  3. Having nothing to do with the matter in hand; irrelevant, out of place.[2][15]
  4. Keeping apart from something; indifferent to it, taking no part: Ficou alheio à discussão.[2][13][1]
  5. Lacking something; free or exempt from it.[2][12]
  6. unaware or ignorant of something.[13][1]
  7. absent-minded, absorbed in thought.[13][14][1]

Noun

  1. (masculine) What belongs to others; other people's property.[13][14][12]

Word family

  • alhear
  • alheamento
  • alheiamente

Usage notes

The expression vergonha alheia is the embarrassment felt on someone else's behalf.[1]

References

  1. ^ a b c d e f g h i j k l m n Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. alheio
  3. ^ a b c d Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. alheio
  4. ^ a b CLUL (ed.) (2014), P.S. Post Scriptum: Arquivo Digital de Escrita Quotidiana em Portugal e Espanha na Época Moderna, Lisboa: Centro de Linguística da Universidade de Lisboa, http://ps.clul.ul.pt, p. s.v. alheio
  5. ^ a b c Machado, José Pedro (1987), Dicionário etimológico da língua portuguesa, 4th ed., 5 vols., Lisboa: Livros Horizonte, p. s.v. alheio
  6. ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. alheio
  7. ^ a b c Vieira, Frei Domingos (1871–1874), Grande Diccionario Portuguez ou Thesouro da lingua portugueza, 5 vols., Porto: Ernesto Chardron e Bartholomeu H. de Moraes, p. 1, 304
  8. ^ García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954), p. s.v. alienus
  9. ^ Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 1, 95
  10. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  11. ^ a b 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, 59
  12. ^ a b c Michaelis: Moderno Dicionário da Língua Portuguesa, São Paulo: Melhoramentos (online as Michaelis Dicionário Brasileiro da Língua Portuguesa, https://michaelis.uol.com.br), p. s.v. alheio
  13. ^ a b c d e f 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. alheio
  14. ^ a b c Porto Editora (2013), Grande Dicionário da Língua Portuguesa, Porto: Porto Editora, p. 463
  15. ^ a b Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. alheio

Related etymologies

Cite this entry

“Alheio.” Etymologically, 15 Nov. 2026, etymologically.com/pt/alheio. Accessed 16 Nov. 2026.

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