Etymologically

Etymology and origin of the Portuguese word lousa

Confidence
Probable
Formation
Inherited
First attested
1540–1619 a text, spelt louza More words from the 16th century
Inherited from
Latin *lausa
Ultimate origin
Vulgar Latin *lausa

Pronunciation

  • Brazil: /ˈlo(w).zɐ/, [ˈlo(ʊ̯).zɐ][1]
  • Portugal: /ˈlo(w).zɐ/[1]
  • Northern, Portugal: /ˈlow.zɐ/[1]
  • Portugal, Southern: /ˈlo.zɐ/[1]

Forms

lousa f (plural lousas)[1] Houaiss's historical forms are lausa (1115) and lousam (1138) in Latin charters, louza in a text of 1540–1619 and lousa from 1716.[2] The variant loisa is in dictionaries from 1836.[3]

Etymology

It is inherited from Vulgar Latin *lausa (“flat stone, slate”), a pre-Roman word.[1][4][5] The adjective Latin lausiae is attested, in a phrase meaning “stone chips”, in the mining law of Vipasca, a bronze tablet of the 2nd century AD found at the Roman mines of Aljustrel.[6][7] Houaiss and the DLP derive the word from this Latin form.[2][8] Cunha calls the origin unknown.[9]

Its further origin is disputed.[6][1] Meyer-Lübke thought it Iberian or Celtic, and Schuchardt Celtic; the OLD labels the Latin word Celtic, while Corominas finds it neither Iberian nor Celtic.[6][7][10] Wiktionary mentions Proto-Celtic *lausā (“stone”) and through it Proto-Indo-European *leh₁- (“stone”), but calls the connection problematic.[1] Diez's Latin laus (“praise”) was rejected by Meyer-Lübke both for the sound and for the sense, since the main meaning is “flat stone” and not “tombstone”.[6]

The same word is Galician lousa, Spanish losa, Catalan llosa, Occitan lausa and Old French lose, spread over the whole Iberian Peninsula, southern France and Piedmont.[1][10]

Earliest recorded meaning

Latin charters already have the word: trans illa lausa “beyond that stone slab” in 1115, lousam in 1138.[11][2] The verb lousar “to cover with slabs” is recorded in the 14th century.[12][9] The first dictionaries, Cardoso (1569), Barbosa (1611) and Pereira (1697), give only the sense “trap for birds or beasts”, a stone slab propped up to fall on the prey.[13][14][15]

Semantic evolution

Bluteau refers lousa to lagea “flagstone” and to campa for the slab over a grave, and Morais lists the trap, the gravestone and a stone or tiled floor.[16][17] In geology the word is the slate itself.[2] The school slate gave the sense “blackboard”, the usual word for it in Brazil.[2][18] Regionally it can also mean a rabbit's burrow.[2][19]

Timeline

  • 1115 – trans illa lausa in a Latin charter.[11]
  • 1138 – lousam in a Latin charter.[2]
  • 14th century – the verb lousar.[12]
  • 1540–1619 – the spelling louza.[2]
  • 1569 – Cardoso glosses Lousa with Latin decipula “trap”.[13]
  • 1716 – the spelling lousa.[2]
  • 1789 – Morais lists the flagstone for traps and graves, and lousa de maçacote, a floor of mortar.[17][2]
  • 1836 – the variant loisa.[3]

Meanings

Noun

  1. (geology) slate, a dark rock that splits into thin sheets; a sheet of it: O telhado da casa velha era de lousa.[2][8][1]
  2. A thin slab of stone used for paving or covering; a flagstone, laje.[2][5][1]
  3. A flat gravestone laid over a tomb.[2][8]
  4. A blackboard or school slate framed in wood, written on with chalk; quadro-negro.[2][5][1]
  5. A trap for birds or rodents, a slab propped on a stick that falls on the animal.[2][18]
  6. A hare's or rabbit's burrow; lura.[2][19]

Word family

  • lousar
  • lousão
  • Galician lousa
  • Spanish losa

Usage notes

Lousa is also the name of places in Portugal;[20] Figueiredo, as Nascentes reports him, took the name to mean land where there are slabs.[20]

References

  1. ^ a b c d e f g h i j k l 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 Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. lousa
  3. ^ a b Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. loisa
  4. ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. lousa
  5. ^ a b c Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. lousa
  6. ^ a b c d Nascentes, Antenor (1955), Dicionário etimológico da língua portuguesa, vol. 1: Nomes comuns, Rio de Janeiro (1st ed. 1932, preface by W. Meyer-Lübke)
  7. ^ a b Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  8. ^ a b c 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. lousa
  9. ^ a b Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. lousa
  10. ^ a b Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. losa
  11. ^ 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. lousa
  12. ^ a b Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. lousar
  13. ^ a b Cardoso, Jerónimo (1569–1570), Dictionarium ex lusitanico in latinum sermonem, Lisboa: João Álvares (CLP transcription, Universidade de Aveiro), p. s.v. lousa
  14. ^ Barbosa, Agostinho (1611), Dictionarium lusitanicolatinum, Braga: Fructuoso Lourenço de Basto (CLP transcription, Universidade de Aveiro), p. s.v. lousa
  15. ^ Pereira, Bento (1697), Thesouro da lingoa portuguesa, in the 1697 edition of his Prosodia (1st ed. 1647; CLP transcription, Universidade de Aveiro), p. s.v. lousa
  16. ^ Bluteau, Raphael (1712–1728), Vocabulario portuguez e latino, 8 vols. + 2 supplement vols., Coimbra / Lisboa (CLP transcription, Universidade de Aveiro), p. s.v. lousa
  17. ^ 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, 34
  18. ^ a b Instituto da Lingua Galega, Tesouro do léxico patrimonial galego e portugués (TLPGP), Santiago de Compostela: Universidade de Santiago de Compostela, https://ilg.usc.gal/tesouro, p. s.v. lousa
  19. ^ a b Porto Editora (2013), Grande Dicionário da Língua Portuguesa, Porto: Porto Editora, p. 5771
  20. ^ a b Nascentes, Antenor (1952), Dicionário etimológico da língua portuguesa, vol. 2: Nomes próprios, Rio de Janeiro, p. s.v. lousa

Related etymologies

Cite this entry

“Lousa.” Etymologically, 15 Nov. 2026, etymologically.com/pt/lousa. Accessed 16 Nov. 2026.

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