Etymologically

Etymology and origin of the Portuguese word vau

Confidence
Established
Formation
Inherited
First attested
1200s Cantigas de Santa Maria More words from the 13th century
Inherited from
Latin vadum
Ultimate origin
Proto-Indo-European *weh₂dʰ-
Etymology tree
inherited borrowed derived
Latin vadum
Italian guado
Portuguese vau
Romanian vad
Spanish vado
From the same root
Latin vadōsus ← vadum
Romanian vădos ← vad

Pronunciation

  • Brazil: /ˈvaw/, [ˈvaʊ̯][1]
  • Portugal: /ˈvaw/[1]
  • Northern, Portugal: /ˈbaw/[1]

Forms

vau m (plural vaus)[1] Old Galician-Portuguese wrote vao and uaao, plural vaaos.[2][3][4]

Etymology

It is inherited from Latin vadum (“shallow water, ford”), written Old Galician-Portuguese vao in the oldest texts.[2][3][5][1] The Latin /d/ between vowels was lost, as the old spelling Old Galician-Portuguese uaao shows.[2][6]

The same Latin word is Galician vao, Spanish vado and Romanian vad.[7][1] In Italian, French, Occitan and Catalan it was crossed with the Frankish word wad, which gave Italian guado, French gué, Occitan ga and Catalan gual.[7][8] García de Diego notes that the Spanish form took its -d- from the words in -ado, beside an older Old Spanish vao.[6]

The Latin noun belongs with the verb vādō (“to advance, proceed”).[9][10] De Vaan reconstructs it as *waðom, from Proto-Indo-European *weh₂dʰ- (“to advance”), the root of the Germanic verb for “to wade” (vaða, watan) and of the nouns vað and wat “ford”.[10][1]

Earliest recorded meaning

A Latin charter of 1068 already has the Romance spelling uaao.[2] In Galician-Portuguese the word is recorded in the 13th century: in one of the Cantigas de Santa Maria a man goes into a river at a ford (meteu-ss'enton a vao en aquel rio).[3][4]

Semantic evolution

The figurative sense was already medieval: in a satirical cantiga Johan Fernandez d'Ardeleiro says non acho vao a meu feito “I find no way out for my affair”, where achar vao means “to find a solution”.[4] Houaiss lists the senses “ford”, “shoal” and, figuratively, “favourable occasion, opportunity”, and dates the shipbuilding sense, a cross-beam that carries the deck, to 1597–1617.[2] Vieira in 1871 records tentar o vau “to sound the ford”, used of looking into a matter carefully before going ahead.[11]

In Goiás a vau de cauda is a ford where the water reaches only the animal's tail or belly, and a vau de orelha one that the animal must swim.[2][12] In Rio Grande do Sul a vau is said of crossing a stream without swimming.[13] The verb vadear “to ford” is not derived from vau: Cunha takes it from Spanish in the 16th century.[3]

Timeline

  • 1068 – a Latin charter writes uaao.[2]
  • 13th century – vao in the Cantigas de Santa Maria.[3][4]
  • 14th century – the plural vaaos;[2][4] achar vao “to find a way out” in a satirical cantiga.[2][4]
  • 16th century – vadear is borrowed from Spanish.[3]
  • 1597–1617 – the shipbuilding sense, a deck beam.[2]
  • 1813 – vadoso, from Latin, is recorded.[3]
  • 1871 – Vieira records tentar o vau.[11]

Meanings

Noun

  1. A ford, a shallow place in a river, lake or sea that can be crossed on foot or on horseback: Atravessaram o ribeiro pelo vau.[2][14][1]
  2. A shoal, a sandbank or a raised part of the sea floor; baixio.[2][15][1]
  3. (figurative) A favourable occasion, an opportunity.[2][14]
  4. (nautical) A cross-beam joining two opposite frames of a ship and carrying the deck; in the plural, the crosstrees at a masthead.[2][15][12]
  • vadear
  • vadoso
  • Latin vadum
  • Spanish vado
  • Galician vao

Usage notes

A vau means on foot or on horseback through the water;[2][16] não achar vau not to find a way across, and figuratively to find no way out of a situation;[2][16] de vau a vau from one end to the other.[2][16]

Houaiss, Aurélio and the DLP also record a separate, obsolete vau, the old name of the letter V, from the Greek name bau, from the Hebrew letter name vav “nail, hook”; the DLP also uses it for the sixth letter of the Hebrew and Phoenician alphabets.[2][17][16][5]

References

  1. ^ a b c d e f g h i 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 r Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. vau
  3. ^ a b c d e f g Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. vau
  4. ^ a b c d e f 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. vao
  5. ^ a b Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. vau
  6. ^ a b García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954), p. s.v. vadum
  7. ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 9120a
  8. ^ Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 5, 727
  9. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. uadum
  10. ^ a b 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 Vieira, Frei Domingos (1871–1874), Grande Diccionario Portuguez ou Thesouro da lingua portugueza, 5 vols., Porto: Ernesto Chardron e Bartholomeu H. de Moraes, p. 5, 878
  12. ^ a b 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. vau
  13. ^ Schlee, Aldyr Garcia (2019), Dicionário da Cultura Pampeana Sul-Rio-Grandense, 2 vols., Pelotas: Fructos do Paiz, p. 2
  14. ^ a b Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. vau
  15. ^ a b 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. vau
  16. ^ 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. vau
  17. ^ Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. vau

Related etymologies

Cite this entry

“Vau.” Etymologically, 15 Nov. 2026, etymologically.com/pt/vau. Accessed 16 Nov. 2026.

Last edited on . ·