Etymology and origin of the Portuguese word ruído
- Confidence
- Established
- Formation
- Inherited
- First attested
- 1200s spelt rruido More words from the 13th century
- Inherited from
- Latin rugitus
- Ultimate origin
- Latin rūgiō
Etymology tree
Pronunciation
Forms
ruído m (plural ruídos)[1] Old spellings are rruido (13th century), roydo, rroydo, arroydo and arruydo (14th century), and roido (15th century).[2][3][4]
Etymology
It is inherited from Latin rūgītus (“roaring”), which already meant “din” in Vulgar Latin; the oldest texts write Old Galician-Portuguese rruido.[3][2][5][1] The Latin noun is an action noun of rūgiō (“to roar, bellow”), the source of the Portuguese verb rugir.[3][1][6] The learned rugido “roar” is its doublet.[1]
The same Latin noun is Galician ruído, Spanish ruido, Old French ruit, Italian ruggito and Romanian ruget.[7][1] The Spanish word is first recorded as Old Spanish roído in the poem of the Cid.[8]
De Vaan compares the Latin verb with Ancient Greek ἐρεύγομαι (ereúgomai, “to roar”) and posits a root Proto-Indo-European *(H)ru- (“to roar”), to which various consonants were added.[9]
Earliest recorded meaning
Houaiss's first record is rruido, of the 13th century.[3] Lorenzo cites todo rruido from a cantiga of Estevan da Guarda, grãdes roydos “great noises” from the Crónica Geral and hũu muy grande arroydo “a very great uproar” from the Crónica de 1344.[4]
Semantic evolution
The medieval word meant both a loud noise and a commotion; the forms with a- (arroydo, arruydo) were frequent in the 14th century.[4][2] Figurative senses developed later: a rumour, a scandal or stir (fazer ruído “to cause a sensation”), and pomp or show.[3][10][11] In the 20th century the word took technical senses in acoustics, telecommunications, phonetics and medicine, among them ruído branco “white noise”.[3][5] In Rio Grande do Sul estar no ruído means to know about a matter.[12]
Timeline
- 13th century – rruido.[3][2]
- 14th century – roydo, rroydo and arroydo, in the Crónica Geral and the Crónica de 1344.[2][4]
- 15th century – the spelling roido.[3]
- 1651 – first record of the derivative ruidoso.[13]
- 1682 – roido in a private letter.[14]
Meanings
Noun
- A noise caused by something falling or by bodies striking each other; a crash, a din.[3][15][1]
- Any confused or unharmonious sound.[3][5]
- A continuous, prolonged murmur; bustle (bulício): o ruído do trânsito.[3][11]
- (figurative) A rumour, usually unfounded.[3][10]
- The confused sound of many voices; an uproar, a tumult.[3][15]
- (figurative) A sensation, a scandal;[3][10][11] fazer ruído, to cause a stir.[3][10][11]
- (figurative) pomp, show, ostentation.[3][5]
- (acoustics) A sound made of random vibrations without harmonic relations;[3] ruído branco, white noise.[3]
- (communication, telecommunications) Any disturbance or unwanted signal that interferes with the transmission of a message.[3][16]
- (phonetics) The sound produced when the airstream is obstructed, as in consonants.[3]
- (medicine) A sound from an organ heard by auscultation.[3]
Word family
- ruidoso
Related words
Usage notes
The same spelling is also the past participle of ruir “to collapse”, which has a separate source, Latin ruō.[17][1]
References
- ^ a b c d e f g h i j k Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. ruído
- ^ a b c d e f g h i j k l m n o p q r s t u Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. ruído
- ^ a b c d 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. ruido
- ^ a b c d Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. ruído
- ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 7428
- ^ García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954)
- ^ Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 5, 83
- ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
- ^ 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. ruído
- ^ a b c d Porto Editora (2013), Grande Dicionário da Língua Portuguesa, Porto: Porto Editora, p. 8200
- ^ Schlee, Aldyr Garcia (2019), Dicionário da Cultura Pampeana Sul-Rio-Grandense, 2 vols., Pelotas: Fructos do Paiz, p. s.v. ruído
- ^ Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. ruidoso
- ^ 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. ruído
- ^ a b Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. ruído
- ^ Aulete, Francisco Júlio Caldas, Dicionário contemporâneo da língua portuguesa (1st ed. 1881), online as Aulete Digital, Rio de Janeiro: Lexikon, https://aulete.com.br, p. s.v. ruído
- ^ Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. ruir
Related etymologies
Cite this entry
“Ruído.” Etymologically, 15 Nov. 2026, etymologically.com/pt/ru%C3%ADdo. Accessed 16 Nov. 2026.
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