Etymology and origin of the Portuguese word necessário
- Confidence
- Established
- Formation
- Borrowing
- First attested
- 1256 a Galician charter More words from the 13th century
- Borrowed from
- Latin necessarius
- Ultimate origin
- Latin necesse
Etymology tree
From the same root
Forms
necessário (feminine necessária, masculine plural necessários, feminine plural necessárias)[1] Medieval texts write neçasario (1390), neçessaryo (14th century) and, in the 15th century, necessario, necesserio and necessarea.[2] A letter of 1622 still writes neçeçario.[3]
Etymology
It is borrowed from Latin necessārius (“unavoidable, indispensable”), formed from necesse (“necessary”) with the suffix -ārius.[2][4][1] Nascentes calls it a learned word.[5] The Latin adjective was also a noun, “a close connection, a relative or friend”.[6][7]
The same Latin word was borrowed as Spanish necesario, Catalan necessari, French nécessaire, recorded from 1119, and Italian necessario.[8][7][1]
The Latin word was used mostly impersonally, with the verb “to be”, for “it is necessary”; the DHLF takes it as the neuter of an unattested adjective, and Wiktionary derives it from ne- (“not”) and cessus (“yielded”), the participle of cēdō (“to yield, withdraw”).[7][1]
Earliest recorded meaning
Lorenzo's earliest record is a Galician charter of 1256: et que las lauredes ben de todo lauor necessario “and that you work them well with every necessary labour”.[9] Houaiss takes the same date from Machado, and Cunha dates the word to the 13th century.[2][4]
Semantic evolution
Morais's dictionary of 1789 defines it as “not voluntary or spontaneous”, “what cannot fail to be or be otherwise”, opposed to contingent, and “indispensable”, as food is for life.[10] Vieira quotes Damião de Góis on the things needed for divine service sent overseas.[11] The philosophical and logical senses of the modern dictionaries continue Morais's, and the noun o necessário names what is needed, or the minimum on which one can live.[12][13][14]
Timeline
- 1256 – lauor necessario in a Galician charter.[9][2]
- 1390 – the spelling neçasario.[2]
- c. 1430 – necessario and neçessario in the Horto do Esposo (witness 1390–1437).[15][16]
- 1503 – necesarios in a private letter.[3]
- 1789 – Morais opposes necessário to contingent.[10]
Meanings
Adjective
- necessary, indispensable, essential: a água é necessária às plantas.[2][12][1]
- That cannot be avoided; inevitable.[2][12]
- Required, that must be done: é necessário assinar aqui.[2][13]
- Morally obligatory.[2]
- (logic) Following inevitably from the premises; true in every case.[2][12][13]
- (philosophy) Existing of itself, opposed to contingente.[12][17][14]
Noun
- o necessário: what is needed for a purpose; the goods and conditions one cannot live without.[13][14][18]
Word family
- desnecessário
Related words
- necessidade
- necessitar
- Latin necessārius
References
- ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h i j Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. necessário
- ^ 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. necessário
- ^ a b Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. necessário
- ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. necessário
- ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. necessārius
- ^ a b c Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert, p. s.v. nécessaire
- ^ 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. necesario
- ^ a b 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. necessario
- ^ 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. 2, 111
- ^ Vieira, Frei Domingos (1871–1874), Grande Diccionario Portuguez ou Thesouro da lingua portugueza, 5 vols., Porto: Ernesto Chardron e Bartholomeu H. de Moraes, p. 4, 411
- ^ a b c d e Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. necessário
- ^ a b c d 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. necessário
- ^ a b c Porto Editora (2013), Grande Dicionário da Língua Portuguesa, Porto: Porto Editora, p. 6454
- ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. necessario
- ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. neçessario
- ^ Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. necessário
- ^ 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. necessário
Related etymologies
Cite this entry
“Necessário.” Etymologically, 15 Nov. 2026, etymologically.com/pt/necess%C3%A1rio. Accessed 16 Nov. 2026.
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